52 lines
2.3 KiB
C++
52 lines
2.3 KiB
C++
// fig09_12.cpp
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// Constructor with default arguments.
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#include <fmt/format.h>
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#include <iostream>
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#include <stdexcept>
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#include <string>
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#include "Time.h" // include definition of class Time from Time.h
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// displays a Time in 24-hour and 12-hour formats
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void displayTime(std::string_view message, const Time& time) {
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std::cout << fmt::format("{}\n24-hour time: {}\n12-hour time: {}\n\n",
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message, time.to24HourString(), time.to12HourString());
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}
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int main() {
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const Time t1{}; // all arguments defaulted
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const Time t2{2}; // hour specified; minute & second defaulted
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const Time t3{21, 34}; // hour & minute specified; second defaulted
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const Time t4{12, 25, 42}; // hour, minute & second specified
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std::cout << "Constructed with:\n\n";
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displayTime("t1: all arguments defaulted", t1);
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displayTime("t2: hour specified; minute and second defaulted", t2);
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displayTime("t3: hour and minute specified; second defaulted", t3);
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displayTime("t4: hour, minute and second specified", t4);
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// attempt to initialize t5 with invalid values
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try {
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const Time t5{27, 74, 99}; // all bad values specified
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}
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catch (const std::invalid_argument& e) {
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std::cerr << fmt::format("t5 not created: {}\n", e.what());
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}
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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**************************************************************************/
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