yanghui杨辉三角--(一维数组

#include <iostream>
#define N 15
using namespace std;
int a[N]={1};
void yanghui(int n)
{
 int i,j;
 for(i=0;i<n;i++)  
 {   for(j=0;j<=i;j++) cout<<a[j]<<" ";      
                       cout<<"\n";
       for(j=i+1;j>=1;j--) a[j]+=a[j-1];
   
 }
}                                        

int main()                    
{
  int i,j,n;
  cin>>n;  yanghui(n);
 
 return 0;
}