C++ References Example

ref_example.cpp

#include <iostream>
using namespace std;

void addFiveToNum(int &n);

int main() {
	int myNumber1 = 10;
	int myNumber2 = 20;

	cout << "Before" << endl << "------" << endl; 
	cout << "myNumber1 is: " << myNumber1 << endl;	// "myNumber1 is: 10"
	cout << "myNumber2 is: " << myNumber2 << endl;	// "myNumber2 is: 20"

	addFiveToNum(myNumber1);	// Add five to myNumber1
	addFiveToNum(myNumber2);	// Add five to myNumber2

	cout << endl;
	cout << "After" << endl << "------" << endl;
	cout << "myNumber1 is: " << myNumber1 << endl;	// "myNumber1 is: 15"
	cout << "myNumber2 is: " << myNumber2 << endl;	// "myNumber2 is: 25"
	
	return 0;
}

/*
 *	Accepts a references to an int and increments the variable by 5.
*/
void addFiveToNum(int &n) {
	n = n + 5;
}