【c】杨辉三角

#include<stdio.h>#include<stdlib.h>int main(){int i,j;int a[i][j]={0};for(i=0;i<=20;i++){for(j=0;j<=20;j++){if(a[i+1][j+1]==(a[i][j]+a[i][j+1]))printf("%d",a[i][j]);}printf("\n");}return 0;}