Function Prototyping

//Function Prototyping
#include<iostream>
using namespace std;

int sum(int num1, int num2);
double sum(double num1, double num2);

int main()
{
    //var
    //code
    cout << "This should be an integer ----> "<< sum(1, 2) << endl;
    cout << "This should be a double number ----> " << sum(2.34, 3.56) << endl;
    return 0;
}

int sum(int num1, int num2)
{
    int summ = num1 + num2;

    return summ;
}

double sum(double num1, double num2)
{
    double summ = num1 + num2;

    return summ;
}