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Discount Problem Please Help ASAP

mHart (6)
Basically we have this program that asks the user to input the number of pages and number of copies he/she would like printed. There is also the option to have these pages stapled. Everything is working for me until I attempt to put in a discount. Our directions are if the Cost total for the job >=25.00 then the user recieves a discount. So far I can not get the Discount portion of the code to work, any ideas on what I'm doing wrong?


Here is the code:

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#include <string>
#include <iostream>
#include <iomanip>
#include <cstdlib>

using namespace std;


int main ()
{
    //constant declaration
    const double COST_TO_PRINT = .08; //cost to print per page
    const double STAPLE_COST = .02;   //cost of a staple

    //variable declaration
    int nCopies = 0;                 //number of copies
    int nPages = 0;                  //number of pages
    int Tpages = 0;                   //total to be printed
    double Tcost = 0.0;              //total cost
    char response = 'y' or 'n';
    double Tstaple = 0.0;
    double Discount = 0.0;
    double fCost = 0.0;
    double cTotal = 0.0;

    //greeting

    cout << "Print4u Printing Services"<<endl<<endl;


    //ask number of copies
    cout << "Enter number of copies: ";
    cin >> nCopies;
    if (nCopies <=0)
    {
        cout << "Invalid number of copies - must be >= 1"<<endl;
    exit(0);
    }

    //ask number of pages
    cout << "Enter number of pages: ";
    cin >> nPages;
    if (nPages <=0)
    {
        cout << "Invalid number of shares - must be >= 1"<<endl;
    }
    else if (nPages == 1)
    {
        cout << endl;
        nPages = 1;
    }
    else if (nPages >1)
    {
        cout << "Do you wish to staple each copy (y/n): ";
        cin >> response;
        cout << endl;

        if (response == 'y')
        {
            Tstaple = nCopies * STAPLE_COST;
        }
        else if (response == 'n')
        {
            Tstaple = 0;
        }
        else if (response = 'y' or 'n')
        {
            cout << "Invalid answer for stapling - must be y or n"<<endl<<endl;
            exit(0);
        }

    }


    //calculate ctotal
    cTotal = Tcost + Tstaple;

    //discount
    if (cTotal < 25.00)
    {
        Discount = 0;
    }
    else if (cTotal >= 25.00)
    {
        Discount = cTotal * .1;
    }


    //calculate number of pages
    Tpages = nCopies * nPages;

    //calculate cost
    Tcost = Tpages * COST_TO_PRINT;


    ////calculate ctotal
    cTotal = Tcost + Tstaple;

    //calculate fCost

    fCost =  cTotal - Discount;

    //print
    cout << fixed << showpoint << setprecision(2) << setw (12);
    cout <<"Cost Copies: " << Tcost <<endl;
    cout <<"Cost Stapling: " << Tstaple <<endl;
    cout <<"Cost Total: " << cTotal <<endl;
    cout <<"Discount: " << Discount <<endl;
    cout <<"=======" <<endl;
    cout <<"Cost Final: " << fCost <<endl;
    return 0;

    }
Last edited on
TheJJJunk (181)
See

http://www.cplusplus.com/forum/beginner/79946/

It looks like you are working on the same problem.
mHart (6)
Yes but we both are having separate problems :(
TheJJJunk (181)
Did you check to see if the discount in his code works?
mHart (6)
I took his way of doing it and used it in mine and it still wouldnt work. Though I've made some progress on mine.

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if (cTotal >= 25.00)
    {
       discount = cTotal * .1;
    }
    else if (cTotal >= 25.00)
    {
        Discount = 15;
    }


it seems to skip the first if, because now my discount is always 15
leftcoast (42)
Try this:

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     cTotal = Tcost + Tstaple;    

     if (cTotal >= 25.00)
          discount = cTotal * .1;


Last edited on
mHart (6)
Same result
leftcoast (42)
I think that the Tcost formula on line 93 needs to be above line 76. Right now Tcost = 0 because the formula comes after it.
TheJJJunk (181)
I think that the Tcost formula on line 93 needs to be above line 76. Right now Tcost = 0 because the formula comes after it.

This is correct.

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Tpages = nCopies * nPages;
Tcost = Tpages * COST_TO_PRINT;


needs to be placed above cTotal = Tcost + Tstaple;

The way you have it now, Tcost will = 0, so you will need 1300 pages and 1300 copies to get your total cost over $25 to get the discount.
Last edited on
leftcoast (42)
Good catch TheJJJunk! I missed the Tpages line.
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