zad_1_osw - 50% done

////////////////////////////////////////////////////////////////////////////////
//        NAME: main.cpp
// DESCRIPTION: A program that helps a printer in making quotes for their
//              products.
//      AUTHOR: Stf Kolew
// AUTHOR/DATE: 2017-10-10
////////////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <iomanip>

using namespace std;

double const BLACK_WHITE_PRINTING = 0.01;
double const COLOURFUL_PRINTING = 0.04;
double const VAT = 17.5;

int const COLOURFUL_PLATE = 28;
int const BINDING = 2;
int const BLACK_WHITE_PLATE = 7;

////////////////////////////////////////////////////////////////////////////////
//        NAME: calculatePriceOfTheJob
// DESCRIPTION: Calculates the price of a job given the number of pages, price
//              per sheet, price per plate, and number of copies.
//   ARGUMENTS: pages, copies, price_per_sheet(opt.), price_per_plate(opt.)
// USES GLOBAL: BINDING
// MODIFIES GL: none
//     RETURNS: double
//      AUTHOR: Stf Kolew
// AUTHOR/DATE: JP 2017-10-10
////////////////////////////////////////////////////////////////////////////////
double calculatePriceOfTheJob(int pages, int copies, double price_per_sheet = 0, int price_per_plate = 0) {
  double total_price = (pages * price_per_plate) + (((pages / 2) * copies) * price_per_sheet) + (copies * BINDING);

  return total_price + (total_price * (VAT / 100));
}

////////////////////////////////////////////////////////////////////////////////
//        NAME: calculatePriceOfTheJob2
// DESCRIPTION: Calculates the price of a job given the number of pages and
//              the number of copies for black and white printing using
//              calculatePriceOfTheJob1 function
//   ARGUMENTS: pages, copies
// USES GLOBAL: BLACK_WHITE_PLATE, BLACK_WHITE_PRINTING, BINDING
// MODIFIES GL: none
//     RETURNS: double
//      AUTHOR: Stf Kolew
// AUTHOR/DATE: JP 2017-10-10
////////////////////////////////////////////////////////////////////////////////
double calculatePriceOfBlackWhitePrinting(int pages, int copies) {
  return calculatePriceOfTheJob(pages, copies, BLACK_WHITE_PRINTING, BLACK_WHITE_PLATE);
}

////////////////////////////////////////////////////////////////////////////////
//        NAME: calculatePriceOfTheJob3
// DESCRIPTION: Calculates the price of a job given the number of pages and
//              the number of copies for black and colour printing using
//              calculatePriceOfTheJob1 function
//   ARGUMENTS: pages, copies
// USES GLOBAL: COLOURFUL_PLATE, COLOURFUL_PRINTING, BINDING
// MODIFIES GL: none
//     RETURNS: double
//      AUTHOR: Stf Kolew
// AUTHOR/DATE: JP 2017-10-10
////////////////////////////////////////////////////////////////////////////////
double calculatePriceOfColourfulPrinting(int pages, int copies) {
  return calculatePriceOfTheJob(pages, copies, COLOURFUL_PRINTING, COLOURFUL_PLATE);
}


int main() {

  cout << "1000 colour books with 32 pages: " << fixed << setprecision(2) << calculatePriceOfColourfulPrinting(32, 1000) << endl;
  cout << "1000 black/white books with 40 pages: " << calculatePriceOfBlackWhitePrinting(40, 2000) << endl;
  cout << "400 black/white books with 160 pages: " << calculatePriceOfBlackWhitePrinting(160, 400) << endl;

  return 0;
}