#include <stdio.h>

int main() {
    char ch;
    int i, j, k;
    scanf("%c", &ch);
    //上三角
    for (i = 0; i <= 2; i++) {
        for (j = 2 - i; j > 0; j--)
            printf(" ");  //打印空格
        for (k = 1; k <= 2 * i + 1; k++) //字符是1,3,5递增
            printf("%c", ch);
        printf("\n");
    }

    //下三角颠倒
    for (i = 2; i > 0; i--) {
        for (j = 0; j <= 2 - i; j++)
            printf(" ");
        for (k = 1; k <= 2 * i - 1; k++)
            printf("%c", ch);
        printf("\n");

    }
}

这种找规律的真的烦