C++ 斐波那契三角形

#include <iostream>
using namespace std;
int main()
{
  int a=0,b=1,i,c,n,j;  
    cout<<"Enter the limit: ";  
    cin>>n;  
    for(i=1; i<=n; i++)  
    {  
        a=0;  
        b=1;  
        cout<<b<<"\t"; 
        for(j=1; j<i; j++)  
        {  
            c=a+b;  
          cout<<c<<"\t";  
            a=b;  
            b=c;
        }  
        cout<<"\n";  
    }  
return 0;
}

Enter the limit: 10 
  1 
  1       1
  1       1       2  
  1       1       2       3 
  1       1       2       3       5 
  1       1       2       3       5       8
  1       1       2       3       5       8       13
  1       1       2       3       5       8       13      21 
  1       1       2       3       5       8       13      21      34  
  1       1       2       3       5       8       13      21      34      55