// fig09_12.cpp 
// Constructor with default arguments.
#include <fmt/format.h>
#include <iostream>
#include <stdexcept>
#include <string>
#include "Time.h" // include definition of class Time from Time.h

// displays a Time in 24-hour and 12-hour formats
void displayTime(std::string_view message, const Time& time) {
   std::cout << fmt::format("{}\n24-hour time: {}\n12-hour time: {}\n\n",
      message, time.to24HourString(), time.to12HourString());
}

int main() {
   const Time t1{}; // all arguments defaulted                            
   const Time t2{2}; // hour specified; minute & second defaulted     
   const Time t3{21, 34}; // hour & minute specified; second defaulted
   const Time t4{12, 25, 42}; // hour, minute & second specified      

   std::cout << "Constructed with:\n\n";
   displayTime("t1: all arguments defaulted", t1);
   displayTime("t2: hour specified; minute and second defaulted", t2);
   displayTime("t3: hour and minute specified; second defaulted", t3);
   displayTime("t4: hour, minute and second specified", t4);

   // attempt to initialize t5 with invalid values
   try {
      const Time t5{27, 74, 99}; // all bad values specified
   }
   catch (const std::invalid_argument& e) {
      std::cerr << fmt::format("t5 not created: {}\n", e.what());
   }
}



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