/******************************************/
/*                                        */
/* Author:  L. Frye                       */
/*                                        */
/* Date:  May 26, 2004                    */
/*                                        */
/* Filename:  functions.cpp               */
/*                                        */
/* Description: This is a program to      */
/*        illustrate how functions work.  */
/*                                        */
/******************************************/
#include <iostream>

using namespace std;

int fun1(int num1);

int z;

int main()
{
  int x = 1, y = 2;
  cout << "x = " << x << endl;
  cout << "y = " << y << endl;
  z = 10;
  y = fun1(x);
  cout << "x = " << x << endl;
  cout << "y = " << y << endl;
  cout << "This is so much fun!" << endl;

  return 0;
}  // end main

/******************************************/
/*                                        */
/* Function name: fun1                    */
/* Parameters: num1 - a whole number      */
/* Return value: a different whole number */
/* Description: This function is an       */
/*   example to help learn about          */
/*   functions and what happens when the  */
/*   value of a parameter changes.        */
/*                                        */
/******************************************/
int fun1(int num1)
{
  int num2 = 10;
  cout << "z = " << z << endl;
  cout << "num1 = " << num1 << endl;
  cout << "num2 = " << num2 << endl;
  num1 = num2 + 5;
  num2 = 50;
  cout << "num1 = " << num1 << endl;
  cout << "num2 = " << num2 << endl;
  return num2;
}  // end function fun1