C++ Programming: From Problem Analysis to Program Design
C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN: 9781337102087
Author: D. S. Malik
Publisher: Cengage Learning
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Chapter 12, Problem 9SA

Explanation of Solution

The program execution is explained in the in-lined comments:

#include <iostream> 

using namespace std; 

int main()  

{  

    //declare variables dec1, dec2 and initialize

    double dec1 = 2.5;

    double dec2 = 3.8;

    //declare double pointers p and q

    double *p, *q;

    //assign the address of variable dec1 to p

    p = &dec1;

    //assign the value of dec2 - dec1 to the memory

    //location pointed to by p which is dec1

    //so dec1 now holds the value (3.8-2.5 =) 1.3

    *p = dec2 - dec1;

    //q is assigned the value of p so both the pointers

    //now point to variable dec1

    q = p;

    //content of the memory location pointed to by q

    //is assigned 10.00 so dec1 holds the value 10.0

    *q = 10.0;

    //the contents of the memory location pointed to by p

    //i.e dec1 is assigned the value of the RHS expression

    //RHS = 2 &*#x00A0;10 + 10...

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