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Chapter 12, Problem 13SA

Explanation of Solution

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

#include <iostream> 

#include <iomanip>

using namespace std; 

int main()  

{  

    //declare pointer variables and allocate memory

    double *trip1Cost = new double;

    double *trip2Cost = new double;

    double *trip3Cost = new double;

    double *max;

    //store values in the allocated memory 

    *trip1Cost = 100.00;

    *trip2Cost = 350.00;

    //assign pointer variables to each other

    //trip3Cost now points to location having 

    //stored 350.00 later trip2Cost points

    //to location having a stored value 100.00

    trip3Cost = trip2Cost;

    trip2Cost = trip1Cost;

    //trip1Cost is now pointed to freshly allocated

    //memory location and assigned value

    trip1Cost = new double;

    //trip1Cost points to a location having

    //stored value of 175 and trip3Cost now

    //points to a location having a stored value 275

    *trip1Cost = 175;

    *trip3Cost = 275;

    //sets the output format

    cout << fixed << showpoint << setprecision(2);

    //prints the arithmetic expression

    //(*trip1Cost + *trip2Cost + *trip3Cost) which

    //evaluates to (175 + 100...

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