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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4.  
  5. using namespace std;
  6.  
  7. class Time
  8. {
  9. private:
  10.     int hours;
  11.     int minutes;
  12.     int seconds;
  13.  
  14. public:
  15.     Time(string timeStr); 
  16.     int toSeconds();
  17.     void displayTime();
  18. };
  19.  
  20. class Clock
  21. {
  22. private:
  23.     string name;
  24.     Time currentTime;
  25.  
  26. public:
  27.     Clock(string clockName, string timeStr);
  28.     void showElapsedTime();
  29. };
  30.  
  31. Time::Time(string timeStr) 
  32. {
  33.     char colon; 
  34.     stringstream ss(timeStr);
  35.     ss >> hours >> colon >> minutes >> colon >> seconds;
  36. }
  37.  
  38. int Time::toSeconds()
  39. {
  40.     return hours * 3600 + minutes * 60 + seconds;
  41. }
  42.  
  43. void Time::displayTime() 
  44. {
  45.     cout << (hours < 10 ? "0" : "") << hours << ":"
  46.         << (minutes < 10 ? "0" : "") << minutes << ":"
  47.         << (seconds < 10 ? "0" : "") << seconds;
  48. }
  49.  
  50. Clock::Clock(string clockName, string timeStr) : name(clockName), currentTime(timeStr) {}
  51.  
  52. void Clock::showElapsedTime(){
  53.     cout << "Clock " << name << " is displaying time: ";
  54.     currentTime.displayTime();
  55.     cout << endl;
  56.     cout << "Elapsed time since 00:00:00: " << currentTime.toSeconds() << " seconds." << endl;
  57. }
  58.  
  59. int main() {
  60.     // Input clock details
  61.     string clockName, timeStr;
  62.  
  63.     cout << "Enter clock name: ";
  64.     getline(cin, clockName);
  65.     cout << "Enter current time (HH:MM:SS): ";
  66.     cin >> timeStr;
  67.  
  68.     // Create a Clock object
  69.     Clock myClock(clockName, timeStr);
  70.  
  71.     // Display elapsed time
  72.     myClock.showElapsedTime();
  73.  
  74.     return 0;
  75. }
  76.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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Enter clock name: Enter current time (HH:MM:SS): Clock  is displaying time: 0-1449249208:32765:0-1281761755
Elapsed time since 00:00:00: -191680015 seconds.
https://ideone.com/y4dujY
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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