Navigating C++ and Object-Oriented Design

4.9. Copy Constructors

When you're a fan of old classic movies (like we are), it's always a bit of a problem determining the date of your favorite movie when the credits display the year as a Roman numeral. Most dictionaries list only the Roman numeral alphabet, so here's a C++ program that displays years and their Roman numeral equivalents.

Listing 4.8. Roman objects

// movies.C - display years as Roman numbers #include <iostream.h> #include "Roman.h" int main() { for (int year = 1925; year <= 1948; year++) { Roman r = year; cout << r.getnum() << '\t' << r.getroman() << endl; } return 0; }

The program loops through the years between 1925 and 1948. Initializing a Roman object to a year is the same as calling a constructor with an integer year ...