Fibonacci using Recursion in CPP

fibonacci.cpp

#include <iostream>
using namespace std;

int fib(int n){
  if(n<=1){return n;}else{
    return fib(n-2) + fib(n-1);
  }
}

int main(){
  int n = 0;
  cout << fib(n) << endl;
  return 0;
}