Question

Subject is C++

Write a program to compute internet charges according to a rate schedule.

The rate schedule is as follows:

$0.08 per GB for usage between 0 and 40 GB, inclusive

$0.07 per GB for usage between 41 GB and 70 GB, inclusive

$0.05 per GB for usage between 71 GB and 110 GB, inclusive

$0.04 per GB for usage greater than 110 GB

code must use these four functions, using these names (in addition to main):

1. getData
2. computeCharges
3. printAccountInfo
4. printTotals

Requirements for the getData Function

Purpose:	This function prompts the user for an account number (integer) and a GB value (integer). It passes these values back to main via two output parameters.
Output Parameters:	account number (as an integer) GB value (as an integer)
Algorithm:	Prompt and read. There must be only one prompt, and the user must enter the data on one line with a space between each value.
Return value:	None

Requirements for the computeCharges Function

Purpose:	This function computes the charges for one transaction. It uses one input parameter (GB value as an integer) and a return value (amount of the charge, which may include decimals).
Input Parameter:	GB value (as an integer)
Algorithm:	Use a selection structure to determine the charge per GB, using the above rate schedule. Calculate the charges using multiplication.
Return value:	Transaction charges (may include decimals)

Requirements for the printAccountInfo Function

Purpose:	This function displays the information for one account transaction to the screen.
Input Parameters:	account number GB value Transaction charges
Algorithm:	Print, using appropriate spacing and formatting. The transaction charges must display with two decimal places.
Return value:	None

Requirements for the printTotals Function

Purpose:	This function displays totals to the screen at the end of the program.
Input Parameters:	Total number of accounts Sum of all GB values Sum of all transaction charges
Algorithm:	Print, using appropriate spacing and formatting. The sum of transaction charges must display with two decimal places.
Return value:	None

Requirements for main:

1. Variable declarations in main should only include the variables needed within main. Do not declare all the variables needed in the program here – only the ones needed within main.
2. The main function must use a conditional loop that prompts the user to enter a Y or an N to indicate if they wish to continue adding more input. Your code must be able to handle lowercase or uppercase: y, Y, n, or N.

Be sure the first prompt is for actual data, not the continuation response.

IMPORTANT NOTE ABOUT THIS LOOP – You will encounter the situation where there is a scanf for a number immediately before the scanf for the Y or N. We have seen this problem before…

3. The loop body calls the appropriate functions with the appropriate arguments and return values, if necessary. Within the loop, you must keep track of the totals needed by the printTotals function.
4. When the loop is complete, call the print_totals function with the appropriate arguments.
5. All prompts and output must display exactly as demonstrated in the sample runs below. Pay attention to spacing and alignment!

Sample Run

Enter account number and GB used (one space between data): 12345 80
Account number: 12345        GB Used:     80        Charge:     4.00

Do you wish to continue? (y/n) y

Enter account number and GB used (one space between data): 98765 25
Account number: 98765        GB Used:     25        Charge:     2.00

Do you wish to continue? (y/n) Y

Enter account number and GB used (one space between data): 25413 120
Account number: 25413        GB Used:    120        Charge:     4.80

Do you wish to continue? (y/n) Y

Enter account number and GB used (one space between data): 42598 50
Account number: 42598        GB Used:     50        Charge:     3.50

Do you wish to continue? (y/n) n

Total accounts =        4
Total GB Used =       275
Total Charges =     14.30

Answer 1

Here is the code:

#include <iostream>
#include <iomanip>
using namespace std;

void getData (int &account, int &usage) {
    cout << "Enter account number and GB used (one space between data): ";
    scanf ("%d %d", &account, &usage);
    while ((getchar()) != '\n');
}

double computeCharges (int usage) {
    if (usage <= 40)
        return (0.08 * usage);
    else if (usage <= 70)
        return (usage * 0.07);
    else if (usage <= 110)
        return (usage * 0.05);
    else
        return (usage * 0.04);
}

void printAccountInfo (int account, int usage, double charges) {
    cout << "Account number: " << account << "\tGB Used:\t" << usage << "\tCharge: \t";   
    cout << std::setprecision(2) << std::fixed << charges << endl;
}

void printTotals (int totalAccounts, int totalUsage, double totalCharges) {
    cout << "Total accounts = \t" << totalAccounts << endl;
    cout << "Total GB Used = \t" << totalUsage << endl;
    cout << std::setprecision(2) << std::fixed;
    cout << "Total Charges = \t" << totalCharges << endl;
}

int main()
{
    int account, usage, totalUsage = 0, noAccounts = 0;
    double charges, totalCharges = 0;
    char yn;
    

    do {
        getData (account, usage);    
        charges = computeCharges (usage);
        printAccountInfo (account, usage, charges);
        cout << "Do you wish to continue? (y/n)";
        scanf ("%c", &yn);
        yn = tolower (yn);
        
        noAccounts++;
        totalUsage += usage;
        totalCharges += charges;
    } while (yn == 'y');
    
    printTotals (noAccounts, totalUsage, totalCharges);

    return 0;
}