How to Generate a Fibonacci series in C++ Programming?

#include <iostream>
using namespace std;
int main()
{
int i, a=0,b=1,c, num;
cout << "Enter Number for how many times generate Series: ";
cin >>num;
cout << "Fibonaci Series is: \n";
for(i=0;i<num;i++)
{
c=a+b;
a=b;
   b=c;
cout << "\t" <<c<<endl;
}
return 0;
}