Chapter 6.13, Problem 6.23CP

Output of the Given Program:

/*Include requird header file*/

#include <iostream>

using namespace std;

/*Function prototype*/

void func1(int&, int&);

void func2(int &, int &, int &);

void func3(int, int, int);

/*Main function*/

int main()

{

/*Declare and initialize the variable "x","y" and "z"*/

int x = 0, y = 0, z = 0;

/*Print the value of "x", "y" and "z"*/

cout << x << " " << y << " " << z << endl;

/*Call the function "func1()"*/

func1(x, y);

/*Print the value of "x", "y" and "z"*/

cout << x << " " << y << " " << z << endl;

/*Call the function "func2()"*/

func2(x, y, z);

/*Print the value of "x", "y" and "z"*/

cout << x << " " << y << " " << z << endl;

/*Call the function "func3()"*/

func3(x, y, z);

/*Print the value of "x", "y" and "z"*/

cout << x << " " << y << " " << z << endl;

// Pause the system

system("pause");

/*Return the value 0*/

return 0;

}

/*Function definition for function "func1()"*/

void func1(int &a, int &b)

{

/*Get the value from the user*/

cout << "Enter two numbers: ";

/*Read the value "a" and "b"*/

cin >> a >> b;

}

/*Function definition for function "func2()"*/

void func2(int &a, int &b, int &c)

{

/*Increment the value of "b"*/

b++;

/*Decrement the value of "b"*/

c--;

/*Add the value of "b" and "c" and store it in "a"*/

a = b + c;

}

/*Function definition for function "func3()"*/

void func3(int a, int b, int c)

{

/*Subtract the values "b" and "c" and store it in "a"*/

a = b - c;

}

Explanation:

The given program implements the concept of passing the reference variable as the parameter...