CPP_Basic_Code_P11.1-PP11.9.7

CPP_Basic_Code_P11.1-PP11.9.7

//  The Notes Created by Z-Tech on 2017/2/17.
//  All Codes Boot on 《C++ Primer Plus》V6.0
//  OS：MacOS 10.12.4
//  Translater：clang/llvm8.0.0 &g++4.2.1
//  Editer：iTerm 2&Sublime text 3
//  IDE: Xcode8.2.1&Clion2017.1

//P11.1-P11.3
Z_Head.h
#ifndef XXX_H
#define XXX_H

class Time
{
private:
    int hours;
    int minutes;
public:
    Time();
    Time(int h,int m=0);
    void AddMin(int m);
    void AddHr(int h);
    void Reset(int h=0,int m=0);
    Time Sum(const Time& t) const;
    void Show() const;
};

#endif

SubFunctions.cpp
#include <iostream>
#include "Z_Head.h"

Time::Time()
{
    hours=minutes=0;
}

Time::Time(int h,int m)
{
    hours=h;
    minutes=m;
}

void Time::AddMin(int m)
{
    minutes+=m;
    hours+=minutes/60;
    minutes%=60;
}

void Time::AddHr(int h)
{
    hours+=h;
}

void Time::Reset(int h,int m)
{
    hours=h;
    minutes=m;
}

Time Time::Sum(const Time& t) const
{
    Time sum;
    sum.minutes=minutes+t.minutes;
    sum.hours=hours+t.hours+sum.minutes/60;
    sum.minutes%=60;
    return sum;
}

void Time::Show() const
{
    std::cout<<hours<<" hours, "<<minutes<<" minutes";
}

Main.cpp
#include <iostream>
#include "Z_Head.h"

int main()
{
    using std::cout;
    using std::endl;
    Time planning;
    Time coding(2,40);
    Time fixing(5,55);
    Time total;

    cout<<"Planning time= ";
    planning.Show();
    cout<<endl;

    cout<<"coding time= ";
    coding.Show();
    cout<<endl;

    cout<<"fixing time= ";
    fixing.Show();
    cout<<endl;

    total=coding.Sum(fixing);
    cout<<"coding.Sum(fixing)= ";
    total.Show();
    cout<<endl;

    return 0;
}

//P11.4-P11.6
Z_Head.h
#ifndef XXX_H
#define XXX_H

class Time
{
private:
    int hours;
    int minutes;
public:
    Time();
    Time(int h,int m=0);
    void AddMin(int m);
    void AddHr(int h);
    void Reset(int h=0,int m=0);
    Time operator+(const Time& t) const;
    void Show() const;
};

#endif

SubFunctions.cpp
#include <iostream>
#include "Z_Head.h"

Time::Time()
{
    hours=minutes=0;
}

Time::Time(int h,int m)
{
    hours=h;
    minutes=m;
}

void Time::AddMin(int m)
{
    minutes+=m;
    hours+=minutes/60;
    minutes%=60;
}

void Time::AddHr(int h)
{
    hours+=h;
}

void Time::Reset(int h,int m)
{
    hours=h;
    minutes=m;
}

Time Time::operator+(const Time& t) const
{
    Time sum;
    sum.minutes=minutes+t.minutes;
    sum.hours=hours+t.hours+sum.minutes/60;
    sum.minutes%=60;
    return sum;
}

void Time::Show() const
{
    std::cout<<hours<<" hours, "<<minutes<<" minutes";
}

Main.cpp
#include <iostream>
#include "Z_Head.h"

int main()
{
    using std::cout;
    using std::endl;
    Time planning;
    Time coding(2,40);
    Time fixing(5,55);
    Time total;

    cout<<"Planning time= ";
    planning.Show();
    cout<<endl;

    cout<<"coding time= ";
    coding.Show();
    cout<<endl;

    cout<<"fixing time= ";
    fixing.Show();
    cout<<endl;

    total=coding+fixing;
    cout<<"coding+fixing= ";
    total.Show();
    cout<<endl;

    Time morefixing(3,28);
    cout<<"more fixing time= ";
    morefixing.Show();
    cout<<endl;
    total=morefixing.operator+(total);
    cout<<"morefixing.operator+(total)= ";
    total.Show();
    cout<<endl;

    return 0;
}

//P11.7-P11.
Z_Head.h
#ifndef XXX_H
#define XXX_H

class Time
{
private:
    int hours;
    int minutes;
public:
    Time();
    Time(int h,int m=0);
    void AddMin(int m);
    void AddHr(int h);
    void Reset(int h=0,int m=0);

    Time operator+(const Time& t) const;
    Time operator-(const Time& t) const;
    Time operator*(double n) const;
    void Show() const;
};

#endif

SubFunctions.cpp
#include <iostream>
#include "Z_Head.h"

Time::Time()
{
    hours=minutes=0;
}

Time::Time(int h,int m)
{
    hours=h;
    minutes=m;
}

void Time::AddMin(int m)
{
    minutes+=m;
    hours+=minutes/60;
    minutes%=60;
}

void Time::AddHr(int h)
{
    hours+=h;
}

void Time::Reset(int h,int m)
{
    hours=h;
    minutes=m;
}

Time Time::operator+(const Time& t) const
{
    Time sum;
    sum.minutes=minutes+t.minutes;
    sum.hours=hours+t.hours+sum.minutes/60;
    sum.minutes%=60;
    return sum;
}

Time Time::operator-(const Time& t) const
{
    Time diff;
    int tot1,tot2;
    tot1=t.minutes+60*t.hours;
    tot2=minutes+60*hours;
    diff.minutes=(tot2-tot1)%60;
    diff.hours=(tot2-tot1)/60;
    return diff;
}

Time Time::operator*(double n) const
{
    Time result;
    long totalminutes=hours*n*60+minutes*n;
    result.hours=totalminutes/60;
    result.minutes=totalminutes%60;
    return  result;

}

void Time::Show() const
{
    std::cout<<hours<<" hours, "<<minutes<<" minutes";
}

Main.cpp
#include <iostream>
#include "Z_Head.h"

int main()
{
    using std::cout;
    using std::endl;

    Time weeding(4,35);
    Time waxing(2,47);
    Time total;
    Time diff;
    Time adjusted;

    cout<<"Weeding time= ";
    weeding.Show();
    cout<<endl;

    cout<<"Waxing time= ";
    waxing.Show();
    cout<<endl;

    cout<<"Total work time= ";
    total=weeding+waxing;//运算符+的重载
    total.Show();
    cout<<endl;

    diff=weeding-waxing;//运算符-的重载
    cout<<"weeding-waxing time= ";
    diff.Show();
    cout<<endl;

    adjusted=total*1.5;//运算符*的重载
    cout<<"Adjusted work time= ";
    adjusted.Show();
    cout<<endl;

    return 0;
}

//P11.10-P11.12
Z_Head.h
#ifndef XXX_H
#define XXX_H

class Time
{
private:
    int hours;
    int minutes;
public:
    Time();
    Time(int h,int m=0);
    void AddMin(int m);
    void AddHr(int h);
    void Reset(int h=0,int m=0);

    Time operator+(const Time& t) const;
    Time operator-(const Time& t) const;
    Time operator*(double n) const;

    friend Time operator*(double m,const Time& t){return t*m;}//此处内联函数
    friend std::ostream& operator<<(std::ostream& os,const Time& t);//友元函数声明
};

#endif

SubFunctions.cpp
#include <iostream>
#include "Z_Head.h"

Time::Time()
{
    hours=minutes=0;
}

Time::Time(int h,int m)
{
    hours=h;
    minutes=m;
}

void Time::AddMin(int m)
{
    minutes+=m;
    hours+=minutes/60;
    minutes%=60;
}

void Time::AddHr(int h)
{
    hours+=h;
}

void Time::Reset(int h,int m)
{
    hours=h;
    minutes=m;
}

Time Time::operator+(const Time& t) const
{
    Time sum;
    sum.minutes=minutes+t.minutes;
    sum.hours=hours+t.hours+sum.minutes/60;
    sum.minutes%=60;
    return sum;
}

Time Time::operator-(const Time& t) const
{
    Time diff;
    int tot1,tot2;
    tot1=t.minutes+60*t.hours;
    tot2=minutes+60*hours;
    diff.minutes=(tot2-tot1)%60;
    diff.hours=(tot2-tot1)/60;
    return diff;
}

Time Time::operator*(double n) const
{
    Time result;
    long totalminutes=hours*n*60+minutes*n;
    result.hours=totalminutes/60;
    result.minutes=totalminutes%60;
    return  result;

}

std::ostream& operator<<(std::ostream& os,const Time& t)//友元函数定义不需要friend，原型才需要
{
    os<<t.hours<<" hours,"<<t.minutes<<" minutes.";
    return os;//os引用为cout的别名
}

Main.cpp
#include <iostream>
#include "Z_Head.h"

int main()
{
    using std::cout;
    using std::endl;

    Time aida(3,35);
    Time tosca(2,48);
    Time temp;

    cout<<"Aida and Tosca:\n";
    cout<<aida<<"; "<<tosca<<endl;//理解<<原理

    temp=aida+tosca;
    cout<<"aida+tosca: "<<temp<<endl;

    temp=aida*1.17;
    cout<<"Aida*1.17: "<<temp<<endl;

    cout<<"10.0*Tosca: "<<10.0*tosca<<endl;//可以输出表达式的值

    return 0;
}

//P11.13-P11.15
Z_Head.h
#ifndef XXX_H
#define XXX_H

#include <iostream>
namespace VECTOR
{
    class Vector
    {
    public:
        enum Mode{RECT,POL};
    private:
        double x;
        double y;
        double mag;
        double ang;
        Mode mode;
        //私有函数
        void set_mag();
        void set_ang();
        void set_x();
        void set_y();
    public:
        Vector();
        Vector(double n1,double n2,Mode form=RECT);
        void reset(double n1,double n2,Mode form=RECT);
        ~Vector();
        //以下是内联函数
        double xva1() const {return x;}
        double yxva1() const {return y;}
        double magval() const {return mag;}
        double angval() const { return ang;}
        //模式函数
        void polar_mode();
        void rect_mode();
        //操作符重载函数
        Vector operator+(const Vector& b) const;
        Vector operator-(const Vector& b) const;
        Vector operator-() const;
        Vector operator*(double n) const;
        //友元函数
        friend Vector operator*(double n,const Vector& a);
        friend std::ostream& operator<<(std::ostream& os,const Vector& v);
    };
}

#endif

SubFunctions.cpp
//#include <iostream>
#include <cmath>
#include "Z_Head.h"
using std::sqrt;
using std::sin;
using std::cos;
using std::atan;
using std::atan2;
using std::cout;

namespace VECTOR
{
    const double Rad_to_deg=45.0/atan(1.0);//1弧度=57.29°
    //以下是私有函数
    void Vector::set_mag()//求位移
    {
        mag=sqrt(x*x+y*y);
    }

    void Vector::set_ang()//根据坐标求角度
    {
        if (x==0.0&&y==0.0)
            ang=0.0;
        else
            ang=atan2(y,x);
    }

    void Vector::set_x()//由位移求x坐标
    {
        x=mag*cos(ang);
    }

    void Vector::set_y()//由位移求y坐标
    {
        y=mag*sin(ang);
    }

    //以下是公有函数
    Vector::Vector()//构造函数
    {
        x=y=ang=mag=0.0;
        mode=RECT;
    }

    Vector::Vector(double n1,double n2,Mode form)//构造函数重载的版本
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
            set_mag();
            set_ang();
        }
        else if (form==POL)
        {
            mag=n1;
            ang=n2/Rad_to_deg;
            set_x();
            set_y();
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=mag=ang=0.0;
            mode=RECT;
        }
    }

    void Vector::reset(double n1,double n2,Mode form)//重置函数
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
            set_mag();
            set_ang();
        }
        else if (form==POL)
        {
            mag=n1;
            ang=n2;
            set_x();
            set_y();
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=mag=ang=0.0;
            mode=RECT;
        }
    }

    Vector::~Vector()//析构函数
    {
    }

    void Vector::polar_mode()//极坐标设置函数
    {
        mode=POL;
    }
    void Vector::rect_mode()//直角坐标设置函数
    {
        mode=RECT;
    }

    Vector Vector::operator+(const Vector& b) const
    {
        return Vector(x+b.x,y+b.y);
    }
    Vector Vector::operator-(const Vector& b) const
    {
        return  Vector(x-b.x,y-b.y);
    }
    Vector Vector::operator-() const
    {
        return Vector(-x,-y);
    }
    Vector Vector::operator*(double n) const
    {
        return Vector(x*n,y*n);
    }
    //以下是友元函数
    Vector operator*(double n,const Vector& a)//重载*运算符
    {
        return a*n;
    }
    std::ostream& operator<<(std::ostream& os,const Vector& v)//重载输出流运算符
    {
        if (v.mode==Vector::RECT)
            os<<"(x,y)=("<<v.x<<","<<v.y<<")";
        else if (v.mode==Vector::POL)
        {
            os<<"(m,a)=("<<v.mag<<","<<v.ang*Rad_to_deg<<")";
        }
        else
            os<<"Vector object mode is invaild";
        return os;
    }
}

Main.cpp
#include <iostream>
#include <cstdlib>
#include <ctime>
#include "Z_Head.h"

int main()
{
    using namespace std;
    using VECTOR::Vector;
    srand(time(0));//用0作地址可省略time_t变量声明
    double direction;
    Vector step;
    Vector result(0.0,0.0);
    unsigned long steps=0;
    double target;
    double dstep;
    cout<<"Enter target distance (q to quit): ";
    while (cin>>target)
    {
        cout<<"Enter step length: ";
        if (!(cin>>dstep))
            break;
        while (result.magval()<target)//实际位移小于目标距离
        {
            direction=rand()%360;
            step.reset(dstep,direction,Vector::POL);//步长，随机数和模式参数
            result=result+step;//位移累加
            steps++;
        }
        cout<<"After "<<steps<<" steps,the subject has the following location:\n";
        cout<<result<<endl;
        result.polar_mode();//设为极坐标模式
        cout<<" or\n"<<result<<endl;
        cout<<"Average outward distance per step= "<<result.magval()/steps<<endl;
        steps=0;
        result.reset(0.0,0.0);
        cout<<"Enter target distance (q to quit): ";
    }
    cout<<"Bye!\n";
    cin.clear();
    while (cin.get()!='\n')
        continue;
    return 0;

//P11.16-P11.18
Z_Head.h
#ifndef XXX_H
#define XXX_H

class Stonewt
{
private:
    enum {Lbs_per_stn = 14};
    int stone;
    double pds_left;
    double pounds;
public:
    Stonewt(double lbs);
    Stonewt(int stn, double lbs);
    Stonewt();
    ~Stonewt();
    void show_lbs() const;
    void show_stn() const;
};


#endif

SubFunctions.cpp
#include <iostream>
#include "Z_Head.h"

using std::cout;
Stonewt::Stonewt(double lbs)
{
    stone = int (lbs)/Lbs_per_stn;
    pds_left = int (lbs)% Lbs_per_stn+lbs-int(lbs);
    pounds = lbs;
}

Stonewt::Stonewt(int stn, double lbs)
{
    stone = stn;
    pds_left = lbs;
    pounds = stn*Lbs_per_stn+lbs;
}

Stonewt::Stonewt()
{
    stone = pds_left = pounds = 0;
}

Stonewt::~Stonewt()
{

}

void Stonewt::show_lbs() const
{
    cout<<stone<<" stone, "<<pds_left<<" pounds\n";
}

void Stonewt::show_stn() const
{
    cout<<pounds<<" pounds\n";
}

Main.cpp
#include <iostream>
#include "Z_Head.h"

using std::cout;
void display(const Stonewt & st,int n);
int main()
{
    Stonewt incognito = 275;//使用构造函数初始化
    Stonewt wolfe(285.7);
    Stonewt taft(21,8);

    cout<<"The celebrity weighed ";
    incognito.show_stn();
    cout<<"The detective weighed ";
    wolfe.show_stn();
    cout<<"The President weighed ";
    taft.show_lbs();
    incognito = 276.8;
    taft = 325;
    cout<<"After dinner,The celebrity weighed ";
    incognito.show_stn();
    cout<<"After dinner,The President weighed ";
    taft.show_lbs();
    display(taft,2);
    cout<<"The wrestler weighed even more.\n";
    display(422,2);
    cout<<"No stone left unearned\n";
    return 0;
}

void display(const Stonewt & st,int n)
{
    for (int i = 0;i < n;i++)
    {
        cout<<"Wow！";
        st.show_stn();
    }
}

//P11.19-P11.21
Z_Head.h
#ifndef XXX_H
#define XXX_H

class Stonewt
{
private:
    enum {Lbs_per_stn = 14};
    int stone;
    double pds_left;
    double pounds;
public:
    Stonewt(double lbs);
    Stonewt(int stn, double lbs);
    Stonewt();
    ~Stonewt();
    void show_lbs() const;
    void show_stn() const;
    operator int() const;
    operator double()const;
};


#endif

SubFunctions.cpp
#include <iostream>
#include "Z_Head.h"

using std::cout;
Stonewt::Stonewt(double lbs)
{
    stone = int (lbs)/Lbs_per_stn;
    pds_left = int (lbs)% Lbs_per_stn+lbs-int(lbs);
    pounds = lbs;
}

Stonewt::Stonewt(int stn, double lbs)
{
    stone = stn;
    pds_left = lbs;
    pounds = stn*Lbs_per_stn+lbs;
}

Stonewt::Stonewt()
{
    stone = pds_left = pounds = 0;
}

Stonewt::~Stonewt()
{

}

void Stonewt::show_lbs() const
{
    cout<<stone<<" stone, "<<pds_left<<" pounds\n";
}

void Stonewt::show_stn() const
{
    cout<<pounds<<" pounds\n";
}

Stonewt::operator int() const
{
    return int(pounds + 0.5);
}

Stonewt::operator double()const
{
    return pounds;
}

main.cpp
#include <iostream>
#include "Z_Head.h"

int main()
{
    using std::cout;
    Stonewt poppins(9,2.8);
    double p_wt = poppins;
    cout<<"Convert to double => ";
    cout<<"Poppins: "<<p_wt<<" pounds.\n";
    cout<<"Convert to int => ";
    cout<<"Poppins: "<<int(poppins)<<" pounds.\n";
    return 0;
}

//PP11.9.1
Z_Head.h
#ifndef XXX_H
#define XXX_H

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <fstream>
#include <cmath>
namespace VECTOR
{
    class Vector
    {
    public:
        enum Mode{RECT,POL};
    private:
        double x;
        double y;
        double mag;
        double ang;
        Mode mode;
        //私有函数
        void set_mag();
        void set_ang();
        void set_x();
        void set_y();
    public:
        Vector();
        Vector(double n1,double n2,Mode form=RECT);
        void reset(double n1,double n2,Mode form=RECT);
        ~Vector();
        //以下是内联函数
        double xva1() const {return x;}
        double yxva1() const {return y;}
        double magval() const {return mag;}
        double angval() const { return ang;}
        //模式函数
        void polar_mode();
        void rect_mode();
        //操作符重载函数
        Vector operator+(const Vector& b) const;
        Vector operator-(const Vector& b) const;
        Vector operator-() const;
        Vector operator*(double n) const;
        //友元函数
        friend Vector operator*(double n,const Vector& a);
        friend std::ostream& operator<<(std::ostream& os,const Vector& v);
    };
}

#endif

SubFunctions.cpp
#include "Z_Head.h"
using std::sqrt;
using std::sin;
using std::cos;
using std::atan;
using std::atan2;
using std::cout;

namespace VECTOR
{
    const double Rad_to_deg=45.0/atan(1.0);//1弧度=57.29°
    //以下是私有函数
    void Vector::set_mag()//求位移
    {
        mag=sqrt(x*x+y*y);
    }

    void Vector::set_ang()//根据坐标求角度
    {
        if (x==0.0&&y==0.0)
            ang=0.0;
        else
            ang=atan2(y,x);
    }

    void Vector::set_x()//由位移求x坐标
    {
        x=mag*cos(ang);
    }

    void Vector::set_y()//由位移求y坐标
    {
        y=mag*sin(ang);
    }

    //以下是公有函数
    Vector::Vector()//构造函数
    {
        x=y=ang=mag=0.0;
        mode=RECT;
    }

    Vector::Vector(double n1,double n2,Mode form)//构造函数重载的版本
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
            set_mag();
            set_ang();
        }
        else if (form==POL)
        {
            mag=n1;
            ang=n2/Rad_to_deg;
            set_x();
            set_y();
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=mag=ang=0.0;
            mode=RECT;
        }
    }

    void Vector::reset(double n1,double n2,Mode form)//重置函数
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
            set_mag();
            set_ang();
        }
        else if (form==POL)
        {
            mag=n1;
            ang=n2;
            set_x();
            set_y();
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=mag=ang=0.0;
            mode=RECT;
        }
    }

    Vector::~Vector()//析构函数
    {
    }

    void Vector::polar_mode()//极坐标设置函数
    {
        mode=POL;
    }
    void Vector::rect_mode()//直角坐标设置函数
    {
        mode=RECT;
    }

    Vector Vector::operator+(const Vector& b) const
    {
        return Vector(x+b.x,y+b.y);
    }
    Vector Vector::operator-(const Vector& b) const
    {
        return  Vector(x-b.x,y-b.y);
    }
    Vector Vector::operator-() const
    {
        return Vector(-x,-y);
    }
    Vector Vector::operator*(double n) const
    {
        return Vector(x*n,y*n);
    }
    //以下是友元函数
    Vector operator*(double n,const Vector& a)//重载*运算符
    {
        return a*n;
    }
    std::ostream& operator<<(std::ostream& os,const Vector& v)//重载输出流运算符
    {
        if (v.mode==Vector::RECT)
            os<<"(x,y)=("<<v.x<<","<<v.y<<")";
        else if (v.mode==Vector::POL)
        {
            os<<"(m,a)=("<<v.mag<<","<<v.ang*Rad_to_deg<<")";
        }
        else
            os<<"Vector object mode is invaild";
        return os;
    }
}


Main.cpp
#include "Z_Head.h"
int main()
{
    using namespace std;
    using VECTOR::Vector;
    srand(time(0));//用0作地址可省略time_t变量声明
    double direction;
    Vector step;
    Vector result(0.0, 0.0);
    unsigned long steps = 0;
    double target;
    double dstep;
    ofstream fout;//输出流对象
    fout.open("123Fuck.txt");//关联对象和文件
    cout << "Enter target distance (q to quit): ";
    while (cin >> target) {
        cout << "Enter step length: ";
        if (!(cin >> dstep))
            break;
        fout<<"Target Distance: "<<target<<",Step Size: "<<dstep<<endl;
        while (result.magval() < target)//实际位移小于目标距离
        {
            fout<<steps<<": "<<result<<endl;//第二个result是类对象，<<被重载
            direction = rand() % 360;
            step.reset(dstep, direction, Vector::POL);//步长，随机数和模式参数
            result = result + step;//位移累加
            steps++;
        }
        cout << "After " << steps << " steps,the subject has the following location:\n";
        cout << result << endl;

        fout << "After " << steps << " steps,the subject has the following location:\n";
        fout << result << endl;

        result.polar_mode();//设为极坐标模式

        cout << " or\n" << result << endl;
        cout << "Average outward distance per step= " << result.magval() / steps << endl;

        fout << " or\n" << result << endl;
        fout << "Average outward distance per step= " << result.magval() / steps << endl;

        steps = 0;
        result.reset(0.0, 0.0);
        cout << "Enter target distance (q to quit): ";
    }
    cout << "Bye!\n";
    cin.clear();
    while (cin.get() != '\n')
        continue;
    return 0;
}

//PP11.9.2
Z_Head.h
#ifndef XXX_H
#define XXX_H

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <fstream>
#include <cmath>
namespace VECTOR
{
    class Vector
    {
    public:
        enum Mode{RECT,POL};
    private:
        double x;
        double y;
        Mode mode;
        //私有函数
        double set_mag() const;
        double set_ang() const;
        void set_x(double mag,double ang);
        void set_y(double mag,double ang);
    public:
        Vector();
        Vector(double n1,double n2,Mode form=RECT);
        void reset(double n1,double n2,Mode form=RECT);
        ~Vector();
        //以下是内联函数
        double xva1() const {return x;}
        double yxva1() const {return y;}
        double magval() const {return set_mag();}
        double angval() const { return set_ang();}
        //模式函数
        void polar_mode();
        void rect_mode();
        //操作符重载函数
        Vector operator+(const Vector& b) const;
        Vector operator-(const Vector& b) const;
        Vector operator-() const;
        Vector operator*(double n) const;
        //友元函数
        friend Vector operator*(double n,const Vector& a);
        friend std::ostream& operator<<(std::ostream& os,const Vector& v);
    };
}

#endif

SubFunctions.cpp
#include "Z_Head.h"
using std::sqrt;
using std::sin;
using std::cos;
using std::atan;
using std::atan2;
using std::cout;

namespace VECTOR
{
    const double Rad_to_deg=45.0/atan(1.0);//1弧度=57.29°
    //以下是私有函数
    double Vector::set_mag() const//求位移
    {
        return sqrt(x*x+y*y);
    }

    double Vector::set_ang() const//根据坐标求角度
    {
        if (x==0.0&&y==0.0)
            return 0.0;
        else
            return atan2(y,x);

    }

    void Vector::set_x(double mag,double ang)//引入参数，由位移求x坐标
    {
        x=mag*cos(ang);
    }

    void Vector::set_y(double mag,double ang)//由位移求y坐标
    {
        y=mag*sin(ang);
    }

    //以下是公有函数
    Vector::Vector()//构造函数
    {
        x=y=0.0;
        mode=RECT;
    }

    Vector::Vector(double n1,double n2,Mode form)//构造函数重载的版本
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
        }
        else if (form==POL)
        {
            set_x(n1,n2/Rad_to_deg);
            set_y(n1,n2/Rad_to_deg);
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=0.0;
            mode=RECT;
        }
    }

    void Vector::reset(double n1,double n2,Mode form)//重置函数
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
        }
        else if (form==POL)
        {
            set_x(n1,n2/Rad_to_deg);
            set_y(n1,n2/Rad_to_deg);
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=0.0;
            mode=RECT;
        }
    }

    Vector::~Vector()//析构函数
    {
    }

    void Vector::polar_mode()//极坐标设置函数
    {
        mode=POL;
    }
    void Vector::rect_mode()//直角坐标设置函数
    {
        mode=RECT;
    }

    Vector Vector::operator+(const Vector& b) const
    {
        return Vector(x+b.x,y+b.y);
    }
    Vector Vector::operator-(const Vector& b) const
    {
        return  Vector(x-b.x,y-b.y);
    }
    Vector Vector::operator-() const
    {
        return Vector(-x,-y);
    }
    Vector Vector::operator*(double n) const
    {
        return Vector(x*n,y*n);
    }
    //以下是友元函数
    Vector operator*(double n,const Vector& a)//重载*运算符
    {
        return a*n;
    }
    std::ostream& operator<<(std::ostream& os,const Vector& v)//重载输出流运算符
    {
        if (v.mode==Vector::RECT)
            os<<"(x,y)=("<<v.x<<","<<v.y<<")";
        else if (v.mode==Vector::POL)
        {
            os<<"(m,a)=("<<v.set_mag()<<","<<v.set_ang()*Rad_to_deg<<")";
        }
        else
            os<<"Vector object mode is invaild";
        return os;
    }
}

main.cpp
#include "Z_Head.h"

int main()
{
    using namespace std;
    using VECTOR::Vector;
    srand(time(0));//用0作地址可省略time_t变量声明
    double direction;
    Vector step;
    Vector result(0.0, 0.0);
    unsigned long steps = 0;
    double target;
    double dstep;
    ofstream fout;//输出流对象
    fout.open("123Fuck.txt");//关联对象和文件
    cout << "Enter target distance (q to quit): ";
    while (cin >> target)
    {
        cout << "Enter step length: ";
        if (!(cin >> dstep))
            break;
        fout<<"Target Distance: "<<target<<",Step Size: "<<dstep<<endl;
        while (result.magval() < target)//实际位移小于目标距离
        {
            fout<<steps<<": "<<result<<endl;//第二个result是类对象，<<被重载
            direction = rand() % 360;
            step.reset(dstep, direction, Vector::POL);//步长，随机数和模式参数
            result = result + step;//位移累加
            steps++;
        }
        cout << "After " << steps << " steps,the subject has the following location:\n";
        cout << result << endl;

        fout << "After " << steps << " steps,the subject has the following location:\n";
        fout << result << endl;

        result.polar_mode();//设为极坐标模式

        cout << " or\n" << result << endl;
        cout << "Average outward distance per step= " << result.magval() / steps << endl;

        fout << " or\n" << result << endl;
        fout << "Average outward distance per step= " << result.magval() / steps << endl;

        steps = 0;
        result.reset(0.0, 0.0);
        cout << "Enter target distance (q to quit): ";
    }
    cout << "Bye!\n";
    cin.clear();
    while (cin.get() != '\n')
        continue;
    return 0;
}

//PP11.9.3
Z_Head.h
#ifndef XXX_H
#define XXX_H

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <fstream>
#include <cmath>
namespace VECTOR
{
    class Vector
    {
    public:
        enum Mode{RECT,POL};
    private:
        double x;
        double y;
        Mode mode;
        //私有函数
        double set_mag() const;
        double set_ang() const;
        void set_x(double mag,double ang);
        void set_y(double mag,double ang);
    public:
        Vector();
        Vector(double n1,double n2,Mode form=RECT);
        void reset(double n1,double n2,Mode form=RECT);
        ~Vector();
        //以下是内联函数
        double xva1() const {return x;}
        double yxva1() const {return y;}
        double magval() const {return set_mag();}
        double angval() const { return set_ang();}
        //模式函数
        void polar_mode();
        void rect_mode();
        //操作符重载函数
        Vector operator+(const Vector& b) const;
        Vector operator-(const Vector& b) const;
        Vector operator-() const;
        Vector operator*(double n) const;
        //友元函数
        friend Vector operator*(double n,const Vector& a);
        friend std::ostream& operator<<(std::ostream& os,const Vector& v);
    };
}

#endif

SubFunctions.cpp
#include "Z_Head.h"
using std::sqrt;
using std::sin;
using std::cos;
using std::atan;
using std::atan2;
using std::cout;

namespace VECTOR
{
    const double Rad_to_deg=45.0/atan(1.0);//1弧度=57.29°
    //以下是私有函数
    double Vector::set_mag() const//求位移
    {
        return sqrt(x*x+y*y);
    }

    double Vector::set_ang() const//根据坐标求角度
    {
        if (x==0.0&&y==0.0)
            return 0.0;
        else
            return atan2(y,x);

    }

    void Vector::set_x(double mag,double ang)//引入参数，由位移求x坐标
    {
        x=mag*cos(ang);
    }

    void Vector::set_y(double mag,double ang)//由位移求y坐标
    {
        y=mag*sin(ang);
    }

    //以下是公有函数
    Vector::Vector()//构造函数
    {
        x=y=0.0;
        mode=RECT;
    }

    Vector::Vector(double n1,double n2,Mode form)//构造函数重载的版本
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
        }
        else if (form==POL)
        {
            set_x(n1,n2/Rad_to_deg);
            set_y(n1,n2/Rad_to_deg);
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=0.0;
            mode=RECT;
        }
    }

    void Vector::reset(double n1,double n2,Mode form)//重置函数
    {
        mode=form;
        if (form==RECT)
        {
            x=n1;
            y=n2;
        }
        else if (form==POL)
        {
            set_x(n1,n2/Rad_to_deg);
            set_y(n1,n2/Rad_to_deg);
        }
        else
        {
            cout<<"Incorrect 3rd argument to Vector() -- ";
            cout<<"vector set to 0\n";
            x=y=0.0;
            mode=RECT;
        }
    }

    Vector::~Vector()//析构函数
    {
    }

    void Vector::polar_mode()//极坐标设置函数
    {
        mode=POL;
    }
    void Vector::rect_mode()//直角坐标设置函数
    {
        mode=RECT;
    }

    Vector Vector::operator+(const Vector& b) const
    {
        return Vector(x+b.x,y+b.y);
    }
    Vector Vector::operator-(const Vector& b) const
    {
        return  Vector(x-b.x,y-b.y);
    }
    Vector Vector::operator-() const
    {
        return Vector(-x,-y);
    }
    Vector Vector::operator*(double n) const
    {
        return Vector(x*n,y*n);
    }
    //以下是友元函数
    Vector operator*(double n,const Vector& a)//重载*运算符
    {
        return a*n;
    }
    std::ostream& operator<<(std::ostream& os,const Vector& v)//重载输出流运算符
    {
        if (v.mode==Vector::RECT)
            os<<"(x,y)=("<<v.x<<","<<v.y<<")";
        else if (v.mode==Vector::POL)
        {
            os<<"(m,a)=("<<v.set_mag()<<","<<v.set_ang()*Rad_to_deg<<")";
        }
        else
            os<<"Vector object mode is invaild";
        return os;
    }
}

Main.cpp
#include "Z_Head.h"

int main()
{
    using namespace std;
    using VECTOR::Vector;
    srand(time(0));//用0作地址可省略time_t变量声明
    double direction;
    Vector step;
    Vector result(0.0, 0.0);
    unsigned long steps = 0;
    double target;
    double dstep;
    double Max,Min,Average,Sum;
    int numbers,N;
    cout<<"Please enter numbers: ";
    cin>>numbers;
    N=numbers;
    Max=Min=Average=Sum=0;
    ofstream fout;//输出流对象
    fout.open("123Fuck.txt");//关联对象和文件
    cout << "Enter target distance: ";
    cin >> target;
    cout << "Enter step length: ";
    cin >> dstep;
    while (numbers)
    {

        fout<<"Target Distance: "<<target<<",Step Size: "<<dstep<<endl;
        while (result.magval() < target)//实际位移小于目标距离
        {
            fout<<steps<<": "<<result<<endl;//第二个result是类对象，<<被重载
            direction = rand() % 360;
            step.reset(dstep, direction, Vector::POL);//步长，随机数和模式参数
            result = result + step;//位移累加
            steps++;
        }
        cout << "After " << steps << " steps,the subject has the following location:\n";
        cout << result << endl;

        fout << "After " << steps << " steps,the subject has the following location:\n";
        fout << result << endl;

        result.polar_mode();//设为极坐标模式

        cout << " or\n" << result << endl;
        cout << "Average outward distance per step= " << result.magval() / steps << endl;

        fout << " or\n" << result << endl;
        fout << "Average outward distance per step= " << result.magval() / steps << endl;

        if (Min == 0 || Max == 0)
            Min = Max = steps;//第一次初始化为第一次步数
        if (Min > steps)//关键是和下一次循环的步数进行比较
            Min = steps;
        if (Max < steps)//获取最大值
            Max = steps;
        Sum += steps;
        steps = 0;
        result.reset(0.0, 0.0);
        numbers--;
        cout<<endl;
        fout<<endl;
    }
    Average=Sum/N;
    cout<<"Average: "<<Average<<" Max: "<<Max<<" Min: "<<Min<<" Sum: "<<Sum;
    fout<<"Average: "<<Average<<" Max: "<<Max<<" Min: "<<Min<<" Sum: "<<Sum;
    cout<<endl;
    fout<<endl;
    cout << "Bye!\n";
    cin.clear();
    while (cin.get() != '\n')
        continue;
    return 0;
}

//PP11.9.4
Z_Head.h
#ifndef XXX_H
#define XXX_H
#include <iostream>

class Time
{
private:
    int hours;
    int minutes;
public:
    Time();
    Time(int h,int m=0);
    void AddMin(int m);
    void AddHr(int h);
    void Reset(int h=0,int m=0);


    Time operator*(double n) const;

    friend Time operator+(const Time& u,const Time& t);
    friend Time operator-(const Time& u,const Time& t);

    friend Time operator*(double m,const Time& t){return t*m;}//此处内联函数
    friend std::ostream& operator<<(std::ostream& os,const Time& t);//友元函数声明
};

#endif

SubFunctions.cpp
#include "Z_Head.h"

Time::Time()
{
    hours=minutes=0;
}

Time::Time(int h,int m)
{
    hours=h;
    minutes=m;
}

void Time::AddMin(int m)
{
    minutes+=m;
    hours+=minutes/60;
    minutes%=60;
}

void Time::AddHr(int h)
{
    hours+=h;
}

void Time::Reset(int h,int m)
{
    hours=h;
    minutes=m;
}

Time operator+(const Time& u,const Time& t)//改变包括去除类作用域和去除隐式const
{
    Time sum;
    sum.minutes=u.minutes+t.minutes;
    sum.hours=u.hours+t.hours+sum.minutes/60;
    sum.minutes%=60;
    return sum;
}

Time operator-(const Time& u,const Time& t)
{
    Time diff;
    int tot1,tot2;
    tot1=t.minutes+60*(t.hours);
    tot2=u.minutes+60*(u.hours);
    diff.minutes=(tot2-tot1)%60;
    diff.hours=(tot2-tot1)/60;
    return diff;
}

Time Time::operator*(double n) const
{
    Time result;
    long totalminutes=hours*n*60+minutes*n;
    result.hours=totalminutes/60;
    result.minutes=totalminutes%60;
    return  result;

}

std::ostream& operator<<(std::ostream& os,const Time& t)//友元函数定义不需要friend，原型才需要
{
    os<<t.hours<<" hours,"<<t.minutes<<" minutes.";
    return os;//os引用为cout的别名
}

Main.cpp
#include "Z_Head.h"

int main()
{
    using std::cout;
    using std::endl;

    Time aida(3,35);
    Time tosca(2,48);
    Time temp;

    cout<<"Aida and Tosca:\n";
    cout<<aida<<"; "<<tosca<<endl;//理解<<原理

    temp=aida+tosca;
    cout<<"aida+tosca: "<<temp<<endl;

    temp=aida*1.17;
    cout<<"Aida*1.17: "<<temp<<endl;

    cout<<"10.0*Tosca: "<<10.0*tosca<<endl;//可以输出表达式的值

    return 0;
}

//PP11.9.5
Z_Head.h
#ifndef XXX_H
#define XXX_H
#include <iostream>

class Stonewt
{
public:
    enum Mode{STN,LBS,FPD};
private:
    enum {Lbs_per_stn = 14};
    int stone;
    double pds_left;
    double pounds;

    int pounds_int;
    Mode mode;
    void set_stn();
    void set_pds();
    void set_pds_int();
public:
    Stonewt(double lbs,Mode form);
    Stonewt(int stn, double lbs,Mode form);
    Stonewt();
    ~Stonewt();

    void stn_mode();
    void pds_mode();
    void int_pds_mode();
    operator int()const;
    operator double()const;

    Stonewt operator+(const Stonewt & st) const;
    Stonewt operator-(const Stonewt & st) const;
    Stonewt operator*(double n) const;

    friend Stonewt operator*(double n,const Stonewt & st);
    friend std::ostream & operator<<(std::ostream & os,const Stonewt & st);
};

#endif

SubFunctions.cpp
#include "Z_Head.h"

using std::cout;

void Stonewt::set_stn()
{
    stone = int (pounds)/Lbs_per_stn;
    pds_left = int (pounds)% Lbs_per_stn+pounds-int(pounds);
}

void Stonewt::set_pds()
{
    pounds = stone*Lbs_per_stn + pds_left;
}

void Stonewt::set_pds_int()
{
    pounds_int = int(pounds);
}

Stonewt::Stonewt(double lbs,Mode form)
{
    mode = form;
    if (form == STN)
    {
        stone = int(lbs) / Lbs_per_stn;
        pds_left = int(lbs) % Lbs_per_stn + lbs - int(lbs);
        set_pds();
        set_pds_int();
    }
    else if (form == LBS)
    {
        pounds_int = int(lbs);
        pounds = lbs;
        set_stn();
    }
    else if (form == FPD)
    {
        pounds = lbs;
        set_pds_int();
        set_stn();
    }
    else
    {
        cout<< "Incorrect 3rd argument to Stonewt() -- ";
        cout<< "Stonewt set to 0\n";
        stone = pounds = pds_left = 0;
        mode = STN;
    }
}

Stonewt::Stonewt(int stn, double lbs,Mode form)
{
    mode = form;
    if (form == STN)
    {
        stone = stn;
        pds_left = lbs;
        set_pds();
        set_pds_int();
    }
    else if (form == LBS)
    {
        pounds_int = int(stn*Lbs_per_stn + lbs);
        pounds = stn*Lbs_per_stn + lbs;
        set_stn();
    }
    else if (form == FPD)
    {
        pounds = stn*Lbs_per_stn + lbs;
        set_pds_int(); set_stn();
    }
    else
    {
        cout<< "Incorrect 3rd argument to Stonewt() -- ";
        cout<< "Stonewt set to 0\n";
        stone = pounds = pds_left = 0;
        mode = STN;
    }
}

Stonewt::Stonewt()
{
    stone = pds_left = pounds = 0;
    mode = STN;
}

Stonewt::~Stonewt()
{

}

void Stonewt::stn_mode()
{
    mode = STN;
}

void Stonewt::pds_mode()
{
    mode = FPD;
}

void Stonewt::int_pds_mode()
{
    mode = LBS;
}

Stonewt::operator int() const
{
    return int(pounds+0.5);
}

Stonewt::operator double() const
{
    return pounds;
}

Stonewt Stonewt::operator+(const Stonewt & st) const
{
    return Stonewt(pounds+st.pounds,st.mode);
}

Stonewt Stonewt::operator-(const Stonewt & st) const
{
    return Stonewt(pounds-st.pounds,st.mode);
}

Stonewt Stonewt::operator*(double n) const
{
    return Stonewt(pounds*n,mode);
}

Stonewt operator*(double n,const Stonewt & st)
{
    return Stonewt(st.pounds*n,st.mode);
}

std::ostream& operator<<(std::ostream & os,const Stonewt & st)
{
    if (st.mode == Stonewt::STN)
        os<<st.stone<< " stone, " <<st.pds_left<< " pounds\n";
    else if (st.mode == Stonewt::LBS)
        os<<st.pounds_int<< " pounds(int)\n";
    else if (st.mode == Stonewt::FPD)
        os<<st.pounds<< " pounds(double)\n";
    else
        os<< "Error in type\n";
    return os;
}

Main.cpp
#include "Z_Head.h"

int main()
{
    using std::cout;
    using std::cin;
    using std::endl;
    Stonewt incognito(275,Stonewt::FPD);
    Stonewt wolfe(285.7,Stonewt::STN);
    Stonewt taft(21, 8,Stonewt::LBS);
    Stonewt temp;
    cout<< "The celebrity weighed ";
    cout<< incognito <<endl;

    cout<< "The detective weighed ";
    cout<<wolfe<<endl;

    cout<< "The President weighed ";
    cout<<taft<<endl;

    temp = incognito + wolfe;
    cout<< "Incognito + Wolfe = " << temp <<endl;

    temp = wolfe - incognito;
    cout<< "Wolfe - Incognito = " << temp <<endl;

    temp = taft * 10.0;
    cout<< "Taft * 10.0 = " << temp <<endl;

    temp = 10.0 * taft;
    cout<< "10.0 * Taft = " << temp <<endl;

    cin.get();

    return 0;
}


//PP11.9.6
Z_Head.h
#ifndef XXX_H
#define XXX_H
#include <iostream>
using std::cout;
using std::cin;
using std::endl;

class Stonewt
{
private:
    enum {Lbs_per_stn = 14};
    int stone;
    double pds_left;
    double pounds;
public:
    Stonewt(double lbs);
    Stonewt(int stn, double lbs);
    Stonewt();
    ~Stonewt();
    //重载6个关系运算符
    bool operator<(const Stonewt&st) const;
    bool operator<=(const Stonewt&st) const;
    bool operator>(const Stonewt&st) const;
    bool operator>=(const Stonewt&st) const;
    bool operator==(const Stonewt&st) const;
    bool operator!=(const Stonewt&st) const;
    //重载输出流友元函数
    friend std::ostream & operator<<(std::ostream & os,const Stonewt & st);
};

#endif

SubFunctions.cpp
#include "Z_Head.h"

Stonewt::Stonewt(double lbs)
{
    stone = int(lbs) / Lbs_per_stn;
    pds_left = int(lbs) % Lbs_per_stn + lbs - int(lbs);
    pounds = lbs;
}

Stonewt::Stonewt(int stn, double lbs)
{
    stone = stn;
    pds_left = lbs;
    pounds = stn*Lbs_per_stn + lbs;
}

Stonewt::Stonewt()
{
    stone = pds_left = pounds = 0;
}

Stonewt::~Stonewt()
{

}

bool Stonewt::operator<(const Stonewt&st) const
{
    if (pounds<st.pounds)
        return true;
    else
        return false;
}

bool Stonewt::operator<=(const Stonewt&st) const
{
    if (pounds<=st.pounds)
        return true;
    else
        return false;
}

bool Stonewt::operator>(const Stonewt&st) const
{
    if (pounds>st.pounds)
        return true;
    else
        return false;
}
bool Stonewt::operator>=(const Stonewt&st) const
{
    if (pounds>=st.pounds)
        return true;
    else
        return false;
}

bool Stonewt::operator==(const Stonewt&st) const
{
    if (pounds==st.pounds)
        return true;
    else
        return false;
}

bool Stonewt::operator!=(const Stonewt&st) const
{
    if (pounds!=st.pounds)
        return true;
    else
        return false;
}

std::ostream& operator<<(std::ostream & os,const Stonewt & st)
{
    os<<st.pounds<< " pounds\n";
    return os;
}

Main.cpp
#include "Z_Head.h"

int main()
{
    Stonewt sw[6] = { 10.0, 11.0, 12.5 };
    Stonewt temp(11.0);
    //读取循环录入剩余三个位置
    for (int i = 3; i< 6; i++)
    {
        double input;
        cout<< "Enter #" <<i + 1 << ": ";
        cin>> input;
        sw[i] = input;
    }
    //输出全部的数组对象
    for (int i = 0; i< 6; i++)
        cout<< "#" <<i<< ": " <<sw[i];
    int count = 0;
    Stonewt Min = sw[0];
    Stonewt Max = sw[0];
    //计算最大最小和大于等于11.0的计数值
    for (int i = 0; i< 6; i++)
    {
        if (Min >sw[i])
            Min = sw[i];
        if (Max <sw[i])
            Max = sw[i];
        if (temp >= sw[i])
            count++;
    }
    cout<< "The Min pounds: " << Min;
    cout<< "The Max pounds: " << Max;

    cout<< "The numbers not under 11 pounds: " << count;
    cin.get();
    cin.get();

    return 0;
}

//PP11.9.7
Z_Head.h
#ifndef XXX_H
#define XXX_H
#include <iostream>
using namespace std;

class Complex
{
private:
    double R_number;
    double V_number;
public:
    Complex(double r,double v);
    Complex(double r);
    Complex();
    ~Complex();

    Complex operator+(const Complex & rv) const;
    Complex operator-(const Complex & rv) const;
    Complex operator*(double n) const;//数字在后
    Complex operator*(Complex & rv) const;
    Complex operator~() const;

    friend Complex operator*(double n,const Complex & rv);//数字在前
    friend ostream& operator<<(ostream & os,const Complex & rv);
    friend istream& operator>>(istream & is,Complex & rv);
};


#endif

SubFunctions.cpp
#include "Z_Head.h"

Complex::Complex(double r,double v)
{
    R_number=r;
    V_number=v;
}

Complex::Complex(double r)
{
    R_number=r;
    V_number=0.0;
}

Complex::Complex()
{
    R_number=V_number=0;
}

Complex::~Complex()
{

}

Complex Complex::operator+(const Complex & rv) const
{
    return Complex(R_number+rv.R_number,V_number+rv.V_number);
}

Complex Complex::operator-(const Complex & rv) const
{
    return Complex(R_number-rv.R_number,V_number-rv.V_number);
}

Complex Complex::operator*(double n) const
{
    return Complex(n*R_number,n*V_number);
}

Complex Complex::operator*(Complex & rv) const
{
    double real,imaginary;
    real=R_number*rv.R_number-V_number*rv.V_number;//实部:AC-BD
    imaginary=R_number*rv.V_number+V_number*rv.R_number;//虚部:(AD+BC)i
    return Complex(real,imaginary);
}

Complex Complex::operator~() const
{
    return Complex(R_number,-V_number);
}

Complex operator*(double n,const Complex & rv)
{
    return Complex(n*rv.R_number,n*rv.V_number);
}

ostream& operator<<(ostream & os,const Complex & rv)
{
    os<<"("<<rv.R_number<<","<<rv.V_number<<"i)";
    return os;
}

istream& operator>>(istream & is,Complex & rv)//警告！读取到rv中，rv决不能const
{
    cout<<"Enter the Real Number: \n";
    if (is>>rv.R_number)
    {
        cout<<"Enter the imaginary Number: \n";
        is>>rv.V_number;
    }

    return is;
}

Main.cpp
#include "Z_Head.h"

int main()
{
    Complex a(3.0,4.0);
    Complex c;
    cout<<"Enter a complex number (q to quit):\n";
    while (cin>>c)
    {
        cout<<"c is "<<c<<'\n';
        cout<<"complex conjugate is "<<~c<<'\n';
        cout<<"a is "<<a<<'\n';
        cout<<"a + c is "<< a + c <<'\n';
        cout<<"a - c is "<< a - c <<'\n';
        cout<<"a * c is "<< a * c <<'\n';
        cout<<"2 * c is "<< 2 * c <<'\n';//友元函数实现
        cout<<"c * 2 is "<< c * 2 <<'\n';//成员函数实现
        cout<<"Enter a complex number (q to quit):\n";
    }
    cout<<"Done!\n";
    return 0;
}
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