C++ examples for Class:Constructor
Create a constructor for converting from long to Date, buildin type to your own type
#include <iostream> #include <iomanip> using namespace std; class Date {/*from w ww. j ava2s . co m*/ private: int month, day, year; public: Date(int = 7, int = 4, int = 2012); // constructor // constructor for converting from long to Date Date(long); void showDate(); }; // implementation section Date::Date(int mm, int dd, int yyyy) // constructor { month = mm; day = dd; year = yyyy; } // constructor for converting from long to Date Date::Date(long findate) { year = int(findate/10000.0); month = int((findate - year * 10000.0)/100.0); day = int(findate - year * 10000.0 - month * 100.0); } // member function to display a date void Date::showDate() { cout << setfill('0') << setw(2) << month << '/' << setw(2) << day << '/' << setw(2) << year % 100; return; } int main() { Date a; // initialized by the default constructor Date b(20141225L); // initialize with a long integer Date c(4,1,2012); // initialize with the specified values cout << "Dates a, b, and c are "; a.showDate(); cout << ", "; b.showDate(); cout << ", and "; c.showDate(); cout << ".\n"; a = Date(20150103L); // convert a long to a Date cout << "Date a is now "; a.showDate(); cout << ".\n"; return 0; }