第二章 15

#include<stdio.h>#include<stdlib.h>int main(){int n,i,j,k;printf("输入一个正整数n:");scanf("%d",&n);for(i=0;i<n;i++){for(j=0;j<n-i;j++)printf(" ");for(k=0;k<=i;k++)printf(" 1");printf("\n");}return 0;}