Fibbonacci Series C ++ program

#include<iostream>


using namespace std;

int main()
{
   
    int a,b,c,i,n;
    cout<<"Upto How many elements " <<endl;
    cin>>n;
    cout<<"a : ";
    cin>>a;
    cout<<"b : ";
    cin>>b;
 
   
    for (i=0;i<n;i++)
{ c=a+b;
    a=b;
b=c;
cout<<c;}

system ("pause");

}

Fibbonacci Series C ++ program