Pass By Reference

#include <iostream>
#include <stdlib.h>

using namespace std;

void test(int &number) //number = memory address of myNumber //Passing in a memory address.
{
    cout << "step 1: "<< number << endl;
    number++;
    cout << "step 2: " << number << endl;
}

int main()
{

    int myNumber = 1;
    test(myNumber);
    cout << "step 3: " << myNumber << endl;

}