Use Dereferencing pointers to Calculates the purchase price for a given quantity of items - C++ Data Type

C++ examples for Data Type:Pointer

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Description

Use Dereferencing pointers to Calculates the purchase price for a given quantity of items

Demo Code

#include <iostream>
#include <iomanip>

int main()/* ww  w. ja  v  a  2 s .co m*/
{
  int unit_price {295};                 // Item unit price in cents
  int count {};                         // Number of items ordered
  int discQ {25};                       // Quantity threshhold for discount
  double discount {0.07};               // Discount for quantities over discQ
  int* pcount {&count};                 // Pointer to count
  std::cout << "Enter the number of items you want: ";
  std::cin >> *pcount;
  std::cout << "The unit price is " << std::fixed << std::setprecision(2)
            << "$" << unit_price/100.0 << std::endl;

  // Calculate gross price
  int* punit_price{ &unit_price };      // Pointer to unit_price
  int price{ *pcount * *punit_price };  // Gross price via pointers
  int* pprice {&price};                 // Pointer to gross price

  // Calculate net price in US$
  double net_price{};
  double* pnet_price {nullptr};
  pnet_price = &net_price;
  if (*pcount > discQ)
  {
    std::cout << "You qualify for a discount of "
              << static_cast<int>(discount*100.0) << " percent.\n";
    *pnet_price = price*(1.0 - discount) / 100.0;
  }
  else
  {
    net_price = *pprice / 100.0;
  }
  std::cout << "The net price for " << *pcount
            << "items is $" << net_price << std::endl;
}

Result


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