/* program to add one to function parameter - illustrate pass by reference using pointers */
#include <iostream>
using namespace std;

void add1(int *);           //function prototype

int main()
{
    int k = 5;

    cout << "in main - before call: "<< k << endl;
    add1(&k);
    cout << "in main - after call: "<< k << endl;

//  system("pause");
    return 0;
}

/* function that adds one to its parameter */
void add1(int *x)           //x is receiving the address of k
{
    cout << "in function - before adding: " << *x << endl;
    (*x)++;
    cout << "in function - after adding: " << *x << endl;
    return;
}