Header Files Experimenting

--CONSOLE_PLAYGROUND.CPP(MAIN)--
#include "pch.h"
#include <iostream>
#include "USEFUL_FUNCTIONS.h"

using namespace std;

int main()
{
    /* Testing out the functions created in the separate cpp file with the help of
    the header file in the visual studio project */

    //compare_two_values()
    cout << compare_two_values(20, 20) << endl; //Returns 1 if the numbers are the same

    //getLengthOfString()
    string x = "Hello there";
    cout << getLengthOfString(x) << endl;

    //sortIntegerArray()
    int myArray[5] = { 5, 3, 9, 4, 1 };
    sortIntegerArray(myArray, 5);

    int pause; cin >> pause; //Pause the program
    return 0;
}

--USEFUL_FUNCTIONS.H--
#pragma once

using namespace std;

int compare_two_values(int number_one, int number_two);
int getLengthOfString(string unknown_string_length);
void sortIntegerArray(int unsorted_array[], int length);

--USEFUL_FUNCTIONS_DEFINITIONS.CPP--
#include "pch.h"
#include <iostream>
#include "USEFUL_FUNCTIONS.h"

using namespace std;

//Below are some simple functions definitions

int compare_two_values(int number_one, int number_two)
{
    if (number_one > number_two)
        return number_one;
    else if (number_two > number_one)
        return number_two;
    else
        return 1;
}

int getLengthOfString(string unknown_string_length)
{
    int x = 0;

    for (char character_iterator = ' '; character_iterator != '\0'; x++)
    {
        character_iterator = unknown_string_length[x];
    }

    return x - 1;
}

void sortIntegerArray(int (unsorted_array[]), int length)
{
    int temp;
    for (int y = 0; y < length - 1; y++)
    {
        for (int x = (y + 1); x < length; x++)
        {
            if (unsorted_array[y] >= unsorted_array[x])
            {
                temp = unsorted_array[y];
                unsorted_array[y] = unsorted_array[x];
                unsorted_array[x] = temp;
            }
        }
    }

    for (int k = 0; k < length; k++)
    {
        cout << unsorted_array[k] << " ";
    }
}