习题4-9 打印菱形图案

#include<stdio.h>

int main(void)
{
    int n;

    scanf_s("%d", &n);

    for (int i = 1; i <= n / 2; i++)
    {
        for (int j = i; j <= n / 2; j++)
        {
            printf("  ");
        }
        for (int j = 1; j <= i * 2 - 1; j++)
        {
            printf("* ");
        }
        printf("
");
    }

    for (int i = 1; i <= n; i++)
    {
        printf("* ");
    }
    printf("
");

    for (int i = 1; i <= n/2; i++)
    {
        for (int j = i; j <= i * 2 - 1; j++)
        {
            printf("  ");
        }
        for (int j = 1; j <= n - i * 2; j++)
        {
            printf("* ");
        }
        printf("
");
    }

    return 0;
}