.net输出一个空心菱形

您可以使用以下代码来输出一个空心菱形：

int n, c, k, space = 1;
 
printf("Enter number of rows:\n");
scanf("%d",&n);
 
space = n - 1;
 
for (k = 1; k <= n; k++)
{
    for (c = 1; c <= space; c++)
        printf(" ");
 
    space--;
 
    for (c = 1; c <= 2*k-1; c++)
    {
        if (c == 1 || c == 2*k-1)
            printf("*");
        else
            printf(" ");
    }
 
    printf("\n");
}
 
space = 1;
 
for (k = 1; k <= n - 1; k++)
{
    for (c = 1; c <= space; c++)
        printf(" ");
 
    space++;
 
    for (c = 1 ; c <= 2*(n-k)-1; c++)
    {
        if (c == 1 || c == 2*(n-k)-1)
            printf("*");
        else
            printf(" ");
    }
 
    printf("\n");
}

这段代码将输出一个空心菱形，其中用户需要输入菱形的行数。