#include <iostream>
#include <string.h>

using namespace std;

float sum(); // function prototypes
void anotherFunction();
void fun(char a, int i);
void fun(int a, int b);

// the main function
int main() {

    int num = 0;

	anotherFunction();
	fun('w', 6);
	fun(1, 2);

	while (num < 3)
	{
	  cout << "Enter a number: ";
	  cin >> num;

	switch (num)
	{
	case 1: sum(); break;
	case 2: anotherFunction(); break;
	}

	if (num == 3)
	{
		cout << "Good bye!" << endl;
	}

	}

	cout << "I'm inside of main." << endl;
	return 0;
}

// another function
float sum()
{
	cout << "I'm inside of function: sum" << endl;
//	anotherFunction();
	return 50;
}

void anotherFunction()
{
	cout << "I'm inside of anotherFunction" << endl;
  //  sum();
}

void fun(char a, int i)
{
	cout << "First is " << a <<  "  Second is " << i << endl;
}

void fun(int a, int b)
{
	cout << "First is " << a <<  "  Second is " << b << endl;
}