fib.cpp

#include <iostream>

using namespace std; 

long fibonacci (long num1){
	int a,b=0,c=1;

		for(int i=1; i<num1; i++){
			
			a=b+c;
			b=c; 
			c=a;	
			
		}
	return a; 
}
	int main(){
		int n,fib;
	
		cout<<"Give me the number you want to calculate its fibonacci"<<endl;
		cin>>n;
		 fib= fibonacci(n);
		cout<<fib;
		return 0;
	}