题解 | 菱形图案

#include <stdio.h>

int main() {
    int n;
    while (scanf("%d", &n) != EOF) {
        for (int i = 0; i < n + 1; i++) {
            for (int j = 1; j < n - i + 1; j++) {
                printf(" ");
            }
            for (int k = 0; k <= i; k++) {
                printf("* ");
            }
            printf("\n");
        }

        for (int i = 0; i < n; i++) {
            for (int k = 1; k <= i+1; k++) {
                printf(" ");
            }
            for (int j = 0; j < n - i; j++) {
                printf("* ");
            }

            printf("\n");
        }

    }

    return 0;
}