每日一算法:打印一个菱形

#include <stdio.h>int main(){int n;int i,j;scanf("%d",&n);for (i=1; i<=n; i++){for(j=n; j>=i; j--){printf(" ");}for (j=1; j<=2*i-1; j++){printf("*");}printf("\n");}for (j=1; j<=2*n+1; j++){printf("*");}printf("\n");for (i=n+1; i<=2*n;i++){for (j=n;j<i;j++){printf(" ");}for (j=2*(2*n-i)+1; j>=1; j--){printf("*");}printf("\n");}return 0;}