Console.WriteLine("循环次数:");
int nums = Convert.ToInt32(Console.ReadLine());
for (int i = 0; i < nums; i++)
{
for (int n = nums-i-1 ; n>0; n--)
{
Console.Write(" ");
}
for (int n = 1; n <= 2 * i + 1; n++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.ReadKey();