Problem Solving with C++ (10th Edition)
Problem Solving with C++ (10th Edition)
10th Edition
ISBN: 9780134448282
Author: Walter Savitch, Kenrick Mock
Publisher: PEARSON
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Chapter 9.1, Problem 4STE
Program Plan Intro

Pointer in C++:

A pointer is a variable whose value will be another variable’s address. Generally, a pointer variable is declared as follows:

type *var-name;

Here, type is the pointer’s base type and var-name is the pointer variable name. The asterisk is used to designate a variable as a pointer.

Given Program:

//Include libraries

#include <iostream>

//Use namespace

using namespace std;

//Define main method

int main()

{

// Declare pointer variables

int *p1, *p2;

//Assign value

p1 = new int;

//Assign value

p2 = new int;

//Assign value

*p1 = 10;

//Assign value

*p2 = 20;

//Display value

cout << *p1 << " " << *p2 << endl;

//Assign value

p1 = p2;

//Display value

cout << *p1 << " " << *p2 << endl;

//Assign value

*p1 = 30;

//Display value

cout << *p1 << " " << *p2 << endl;

//Pause console window

system("pause");

//Return 0 value

return 0;

}

Program Plan Intro

Pointer in C++:

A pointer is a variable whose value will be another variable’s address. Generally, a pointer variable is declared as follows:

type *var-name;

Here, type is the pointer’s base type and var-name is the pointer variable name. The asterisk is used to designate a variable as a pointer.

Given Program:

//Include libraries

#include <iostream>

//Use namespace

using namespace std;

//Define main method

int main()

{

// Declare pointer variables

int *p1, *p2;

//Assign value

p1 = new int;

//Assign value

p2 = new int;

//Assign value

*p1 = 10;

//Assign value

*p2 = 20;

//Display value

cout << *p1 << " " << *p2 << endl;

//Assign value

p1 = p2;

//Display value

cout << *p1 << " " << *p2 << endl;

//Assign value

*p2 = 30;

//Display value

cout << *p1 << " " << *p2 << endl;

//Pause console window

system("pause");

//Return 0 value

return 0;

}

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