Fibonacci Numbers

# include <iostream>
# include <bits/stdc++.h>

using namespace std;

void input(int &n)
{
    cin>>n;
}

void display(int &c)        
{
    cout<<c<<"  ";
}

void fibo(int &n)
{
  int a=0, b=1, c=0;
    
    while(n--)
    {
        display(c);
        a=b;
        b=c;
        c=a+b;
    }
}

int main()
{
    int n;                    //for no. of elements

    input(n);
    
    fibo(n);                  
    
    return 0;
}