Functions Basic Understanding (Knowledge)

#include <iostream>
using namespace std;

void simpleFunction();

int main()
{
    cout << "Test!" << endl;
    cout << endl;

    simpleFunction();

    return 0;
    }

void simpleFunction()
{
     int x;

     cout << "type in number: ";
     cin >> x;
     cout << "The number u typed in was: " << x << endl;
     system("pause");
     }