Outputting product records & cost, Getting the alignment right. - C++ STL

C++ examples for STL:vector

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Description

Outputting product records & cost, Getting the alignment right.

Demo Code

#include <iostream>
#include <iomanip>
#include <cctype>
#include <vector>
using std::setw;//  w  ww .  j a va2s . c  om

int main()
{
  std::vector<int> product_id;
  std::vector<int> quantity;
  std::vector<double> unit_cost;

  int id {};
  int n {};
  double cost {};
  char answer {};

  // Read the records
  while (true){
    std::cout << "Enter a record - product number, quantity, unit cost separated by spaces: ";
    std::cin >> id >> n >> cost;

    product_id.push_back(id);
    quantity.push_back(n);
    unit_cost.push_back(cost);

    std::cout << "Do you want to enter another record (Y or N): ";
    std::cin >> answer;
    if (std::toupper(answer) == 'N')
       break;
  }
  // Column headings
  std::cout << setw(10) << "Product" << setw(10) << "Quantity" << setw(12) << "Unit Price" << setw(14) << "Cost\n";

  double total_cost {};

  for (int i {}; i < product_id.size(); ++i){
    std::cout << std::setw(8) << product_id[i]
      << std::setw(8) << quantity[i]
      << std::setw(9) << "$" << std::fixed << std::setprecision(2) << setw(5) << unit_cost[i];

    cost = quantity[i] * unit_cost[i];

    total_cost += cost;

    std::cout << std::setw(10) << "$" << std::fixed << std::setprecision(2) << setw(5) << cost << std::endl;
  }
  std::cout << std::setw(40) << "$" << std::fixed << std::setprecision(2) << setw(5) << total_cost << std::endl;

}

Result


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