//实际参数，实际用的参数
int x =max(20, 20);
System.out.println(x);
//引用参数，调试用
//比大小
public static int max(int num1,int num2){
int result =0;
if (num1==num2);
System.out.println("num1=num2");
result =0;
if (num1
result =num1;
}else {
result =num2;
}
return result;
