题解 | #箭形图案#

#include <stdio.h>

int main() {

    int n = 0;

    while (scanf("%d", &n) != EOF) 
    {
        int i = 0;

        for (i = 1; i <= n; i++)
        {
            int o = 0;

            for (o = n; o>= i; o--)//输出前面空格
            {
                printf("  ");
            }

            int p = 0;

            for (p = 1; p <= i; p++)//输出后面*号
            {
                printf("*");
            }

            printf("\n");
        }

        int j = 0;

        for (j = 1; j <= n + 1; j++)//中间一行输出
        {
            printf("*");
        }

        printf("\n");

        int k = 0;

        for (k = 1; k <= n; k++)
        {
            int g = 0;

            for (g = 1; g <= k; g++)//输出前面空格
            {
                printf("  ");
            }

            int h = 0;

            for (h = n; h >= k; h--)//输出后面*号
            {
                printf("*");
            }
            printf("\n");
        }
    }
    return 0;
}