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  1. /////////////////////////////////////
  2. // timepoint classes (booking.hpp)
  3.  
  4. struct timepoint
  5. {
  6.     int hour, minute;
  7.  
  8.     timepoint normalized()                     const; 
  9.     int totalMinutes    ()                     const; 
  10.     int roundedHours    ()                     const; 
  11.     timepoint operator- (timepoint const& rhs) const; 
  12. };
  13.  
  14. struct booking_t
  15. {
  16.     char vehicle;
  17.     timepoint enter, exit;
  18.  
  19.     timepoint parked() const { return exit - enter; }
  20. };
  21.  
  22. /////////////////////////////////////
  23. // main program (main.cpp)
  24. booking_t inputData();
  25. void displayBill(booking_t const& booking);
  26.  
  27. int main(void)
  28. {
  29.     auto booking = inputData();
  30.     displayBill(booking);
  31. }
  32.  
  33. /////////////////////////////////////
  34. // timepoint methods (booking.cpp)
  35.  
  36. timepoint timepoint::normalized() const
  37. {
  38.     timepoint tmp { (hour + minute/60) % 24, minute % 60 };
  39.     while (tmp.minute < 0) tmp.hour--, tmp.minute+=60;
  40.     while (tmp.hour   < 0) tmp.hour+=24;
  41.     return tmp;
  42. }
  43.  
  44. int timepoint::roundedHours() const
  45. {
  46.     return (totalMinutes()-1) / 60 + 1; // TODO check rounding logic
  47. }
  48.  
  49. int timepoint::totalMinutes() const
  50. {
  51.     return hour*60 + minute;
  52. }
  53.  
  54. timepoint timepoint::operator-(timepoint const& rhs) const
  55. {
  56.     return timepoint { 0, totalMinutes() - rhs.totalMinutes() } .normalized();
  57. }
  58.  
  59. #include <iostream>   //used for cout/cin
  60.  
  61. timepoint getTime(std::string label)
  62. {
  63.     int hour, minute;
  64.     std::cout  << "\nHour "   << label << " 0-24: ";
  65.     std::cin >> hour;
  66.     std::cout  << "\nMinute " << label << " 0-60: ";
  67.     std::cin >> minute;
  68.     return { hour, minute };
  69. }
  70.  
  71. /////////////////////////////////////
  72. // global functions - input
  73. booking_t inputData()
  74. {
  75.     std::cout << "Enter C for car, B for bus, T for truck: ";
  76.     char v;
  77.     std::cin >> v;
  78.     auto entered = getTime("vehicle entered");
  79.     auto exited  = getTime("vehicle exited");
  80.     return { v, entered.normalized(), exited.normalized() };
  81. }
  82.  
  83. /////////////////////////////////////
  84. // calculation + billing
  85. #include <sstream>
  86. #include <iomanip>   //used to manipulate data 
  87. #include <map>
  88.  
  89. static std::ostream& operator <<(std::ostream& os, timepoint const& tp)
  90. {
  91.     std::ostringstream oss;
  92.     oss << std::setw(2) << std::setfill('0') << tp.hour << ':' 
  93.         << std::setw(2) << std::setfill('0') << tp.minute;
  94.     return os << oss.str();
  95. }
  96.  
  97. std::pair<float,float> charge(booking_t const& booking)
  98. {
  99.     struct tariff_t { int threshold; float rate1, rate2; };
  100.     const static auto tariffs = std::map<char, tariff_t> {
  101.         { 'c', { 3, 0   , 1.25 } },
  102.         { 'b', { 2, 2.  , 2.5  } },
  103.         { 't', { 1, 3.75, 4.5 } } ,
  104.     };
  105.  
  106.     auto& tariff = tariffs.at(std::tolower(booking.vehicle));
  107.     auto  parked = booking.parked().roundedHours();
  108.  
  109.     return std::make_pair(
  110.             tariff.rate1 * std::min(tariff.threshold, parked)    ,
  111.             tariff.rate2 * std::max(0, parked - tariff.threshold));
  112. }
  113.  
  114. void displayBill(booking_t const& booking)
  115. {
  116.     std::cout << "\n\n    PARKING LOT CHARGE\n";
  117.     std::cout << "Type of vehicle: Car or Bus or Truck\n";
  118.     std::cout << "TIME-IN         " << booking.enter << "\n";
  119.     std::cout << "TIME-OUT        " << booking.exit  << "\n";
  120.     std::cout << "                " << "--------\n";
  121.     std::cout << "PARKING TIME    " << booking.parked() << "\n";
  122.     std::cout << "        ROUNDED " << booking.parked().roundedHours() << "\n";
  123.     std::cout << "                " << "--------\n";
  124.  
  125.     auto  rates = charge(booking);
  126.     float total = rates.first + rates.second;
  127.     std::cout << "TOTAL CHARGE    " << std::fixed << std::setw(7) << std::setprecision(2) << total << "\n\n";
  128. }
  129.  
Success #stdin #stdout 0s 3028KB
comments (?)
stdin 
c 23 55 4 56
stdout 
Enter C for car, B for bus, T for truck: 
Hour vehicle entered 0-24: 
Minute vehicle entered 0-60: 
Hour vehicle exited 0-24: 
Minute vehicle exited 0-60: 

    PARKING LOT CHARGE
Type of vehicle: Car or Bus or Truck
TIME-IN         23:55
TIME-OUT        04:56
                --------
PARKING TIME    05:01
        ROUNDED 6
                --------
TOTAL CHARGE       3.75
https://ideone.com/urdLP2
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
secret

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