#include<iostream>
using namespace std;

class TDate
{
 int year,month,day;
public:
 TDate(int y=2007,int m=1,int d=1);
 TDate(const TDate &date);
 ~TDate();
 void Print();
};

TDate::TDate(int y,int m,int d)
{
 year = y;
 month = m;
 day = d;
 cout<<"Constructor called.\n";
}

TDate::TDate(const TDate &date)
{
 year = date.year;
 month = date.month;
 day = date.day;
 cout<<"Copy Constructor called.\n";
}

void TDate::Print()
{
 cout<<year<<"_"<<month<<"_"<<day<<endl;
}

TDate::~TDate()
{
 cout<<"Destructor called.\n";
}


TDate f(TDate Q)
{
 TDate R(Q);
 return Q;
}

void main()
{
 TDate day1(1998,5,26);
 TDate day3;
 TDate day2(day1);
 TDate day4 = day2;
 day3 = day2;
 day3 = f(day2);
 day3.Print();
}
输出如下：
Constructor called.        // 1
Constructor called.        // 2
Copy Constructor called.   //3
Copy Constructor called.   //4
Copy Constructor called.   //5
Copy Constructor called.   //6
Copy Constructor called.   //7
Destructor called.       //8
Destructor called.        //9      
Destructor called.        //10
1998-5-26                //11
Destructor called.       //12
Destructor called.        //13
Destructor called.        //14
Destructor called.         //15
1-15都是由哪些函数调用的？能帮我都列出来吗？我初学者不太懂额

说的很详细啊，太谢谢你了啊