粉丝提问：C++ 在屏幕上用星号打印菱形

代码：

#define _CRT_SECURE_NO_WARNINGS 1     #include<stdio.h>        void pr_start(int _num)
{int n=0;int i = 0;for (n = 1; n <= 2*_num; n++)         {int temp = n;if (n > _num){temp -= 2 * (n - _num);}for (i = 1; i < 2 * _num; i++){if ((i>=(_num - temp + 1 )) && (i<=(temp + _num-1)))  //找到需要输出 * 时 i 的值{printf("*");}else{printf(" ");}}printf("\n");}
}int main()
{int num = 0;printf("Please enter a number：");scanf("%d", &num);pr_start(num);system("pause");return 0;
}

效果图：