杨辉三角形

#include<stdio.h>#define N 10int main(){int i;int j;int a[N][N];for(i=0;i<N;i++){a[i][i]=1;a[i][0]=1;}for(i=0;i<N;i++){for(j=1;j<=i-1;j++){a[i][j]=a[i-1][j-1]+a[i-1][j];}}for(i=0;i<N;i++){for(j=0;j<=i;j++){printf("%6d",a[i][j]);}printf("\n");}printf("\n");return 0;}