构造函数重载

 #include<iostream.h>
class Date
{
private:
 int year;
 int month;
 int day;
public:
 Date()
 {
  year=2000;month=1;day=1;
  cout<<year<<"/"<<month<<"/"<<day<<endl;
 }
 Date(int d)
 {
  year=2000;month=1;day=d;
  cout<<year<<"/"<<month<<"/"<<day<<endl;
 }
 Date(int m, int d)
 {
  year=2000;month=m;day=d;
  cout<<year<<"/"<<month<<"/"<<day<<endl;
 }
 Date(int y,int m, int d)
 {
  year=y;month=m;day=d;
  cout<<year<<"/"<<month<<"/"<<day<<endl;
 }
};
void main()
{
 Date aday;
 Date bdate(10);
 Date cdate(8,8);
 Date ddate(2010,10,10);
}