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  1. #include <iostream>
  2. #include <string>
  3.  
  4. struct timestamp {
  5.     int hour, min, sec;
  6. };
  7.  
  8.  
  9. // overload handles the prepend-0 issue
  10. std::ostream& operator<<( std::ostream& stream, const timestamp& ts ) {
  11.     return stream 
  12.         << (ts.hour < 10 ? "0" : "") << ts.hour << ":"
  13.         << (ts.min < 10 ? "0" : "") << ts.min << ":"
  14.         << (ts.sec < 10 ? "0" : "") << ts.sec;
  15. }
  16.  
  17. timestamp modify( const timestamp& ts, const std::string& name ) {
  18.     std::cout << name << "'s starting value is: " << ts << "\nWould you like to modify it? [y/n] ";
  19.     std::cout.flush();
  20.  
  21.     char response;
  22.     std::cin >> response;
  23.  
  24.     // If no modification; return original
  25.     if( !( response == 'y' || response == 'Y' ) )
  26.         return ts;
  27.  
  28.     int hour, min, sec;
  29.  
  30.     hour = min = sec = -1;
  31.     while( hour < 0 || hour > 23 ) {
  32.         std::cout << "Please enter hour [0-23]: ";
  33.         std::cout.flush();
  34.         std::cin >> hour;
  35.     }
  36.  
  37.     while( min < 0 || min > 59 ) {
  38.         std::cout << "Please enter minutes [0-59]: ";
  39.         std::cout.flush();
  40.         std::cin >> min;
  41.     }
  42.  
  43.     while( sec < 0 || sec > 59 ) {
  44.         std::cout << "Please enter seconds [0-59]: ";
  45.         std::cout.flush();
  46.         std::cin >> sec;
  47.     }
  48.  
  49.     return timestamp { hour, min, sec };
  50. }
  51.  
  52. int main() {
  53. 	timestamp t1 { 20, 30, 45 };
  54.     timestamp t2 { 19, 25, 55 };
  55.  
  56.     t1 = modify( t1, "Time1" );
  57.     t2 = modify( t2, "Time2" );
  58.  
  59.     std::cout << "Modified:\n" << t1 << "\n" << t2 << std::endl;
  60. }
Success #stdin #stdout 0s 3436KB
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stdin
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Standard input is empty
stdout
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Time1's starting value is: 20:30:45
Would you like to modify it? [y/n] Time2's starting value is: 19:25:55
Would you like to modify it? [y/n] Modified:
20:30:45
19:25:55
https://ideone.com/tQk28z
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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