派生类中的构造函数与析构函数

[cpp]
#include <iostream>
using namespace std;
class Part //部件类
{
    public:
    Part();
    Part(int i);
    ~Part();
private:
    int val;
};
class Whole: public Part
{
    public:
    Whole();
    Whole(int,int,int,int);
    ~Whole();
private:
    Part one;
    Part two;
    int data;
};
Part::Part()
{
    val=0;
    cout<<"The default constructor of part was called "<<val<<endl;
}
Part::Part(int i)
{
    val=i;
    cout<<"The constructor of part was called "<<val<<endl;
}
Part::~Part()
{
    cout<<"The destructor 33 of part was called "<<val<<endl;
}
Whole::Whole()
{
    data=0;
    cout<<"The default constructor of whole was called "<<data<<endl;
}
Whole::Whole(int p, int i,int j,int k):Part(p), two(i),one(j),data(k)
{
    cout<<"The constructor of whole was called "<<data<<endl;
}
Whole::~Whole()
{
    cout<<"The destructor 33 of whole was called "<<data<<endl;
}

int main()
{
    Whole w1;
    Whole w2(1,2,3,4);
    return 0;
}

#include <iostream>
using namespace std;
class Part //部件类
{
    public:
Part();
Part(int i);
~Part();
private:
int val;
};
class Whole: public Part
{
    public:
Whole();
Whole(int,int,int,int);
~Whole();
private:
Part one;
Part two;
int data;
};
Part::Part()
{
    val=0;
cout<<"The default constructor of part was called "<<val<<endl;
}
Part::Part(int i)
{
    val=i;
cout<<"The constructor of part was called "<<val<<endl;
}
Part::~Part()
{
cout<<"The destructor 33 of part was called "<<val<<endl;
}
Whole::Whole()
{
    data=0;
cout<<"The default constructor of whole was called "<<data<<endl;
}
Whole::Whole(int p, int i,int j,int k):Part(p), two(i),one(j),data(k)
{
    cout<<"The constructor of whole was called "<<data<<endl;
}
Whole::~Whole()
{
cout<<"The destructor 33 of whole was called "<<data<<endl;
}

int main()
{
Whole w1;
Whole w2(1,2,3,4);
return 0;
}

补充：软件开发 , C++ ,