题解 | 菱形图案

#include <stdio.h>

int main() {
    int a = 0;
    int j = 0;
    while (scanf("%d", &a) != EOF) {
        for (int i = 1; i <= a + 1; i++) {
            for (j = 1; j <= (a + 1) - i; j++) {
                printf(" ");
            }
            for (j = 1; j <= i; j++) {
                printf("* ");
            }
            printf("\n");
        }//上半部分的打印
        for (int i = a; i > 0; i--) {
            for (j = 1; j <= (a + 1) - i; j++) {
                printf(" ");
            }
            for (j = 1; j <= i; j++) {
                printf("* ");
            }
            printf("\n");
        }
    }
    return 0;
}