fig06_24.cpp

《c＋＋大学教程》源码

// Fig. 6.24: fig06_24.cpp 
// Demonstrating that class objects can be assigned
// to each other using default memberwise assignment.
#include <iostream>

using std::cout;
using std::endl;

// class Date definition
class Date {

public:
   Date( int = 1, int = 1, int = 1990 ); // default constructor
   void print();

private:
   int month;
   int day;
   int year;

}; // end class Date

// Date constructor with no range checking
Date::Date( int m, int d, int y )
{
   month = m;
   day = d;
   year = y;

} // end constructor Date

// print Date in the format mm-dd-yyyy
void Date::print() 
{ 
   cout << month << '-' << day << '-' << year; 

} // end function print

int main()
{
   Date date1( 7, 4, 2002 );
   Date date2;  // date2 defaults to 1/1/1990

   cout << "date1 = ";
   date1.print();
   cout << "\ndate2 = ";
   date2.print();

   date2 = date1;   // default memberwise assignment

   cout << "\n\nAfter default memberwise assignment, date2 = ";
   date2.print();
   cout << endl;

   return 0;

} // end main

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