#include <stdio.h> int main() { int i = 0; int n = 0; int j = 0; int tmp = 0; int t = 0; while (scanf("%d", &n) != EOF) { //先打印上半部分 tmp = n; n = n + 1; for (i = 1; i <= n; i++) { for (j = 1; j <= n - i; j++) { printf(" "); } for (j = 1; j <= i ; j++) { printf("* "); } printf("\n"); } //在打印下半部分 for (i = 1; i < n; i++) { for (j = 1; j <= i; j++) { printf(" "); } for (j = 1; j <= tmp; j++) { printf("* "); } printf("\n"); tmp--; } } return 0; }