自考新教材-p230

源程序：

#include<iostream>
using namespace std;

class BaseClass1
{
protected:
int v1, v2;
public:
BaseClass1();
BaseClass1(int, int);
~BaseClass1();
};

BaseClass1::BaseClass1()
{
cout << "BaseClass1 无参构造函数" << endl;
}

BaseClass1::BaseClass1(int m, int n) :v1(m), v2(n)
{
cout << "BaseClass1 带2个参构造函数" << endl;
}

BaseClass1::~BaseClass1()
{
cout << "BaseClass1 析构函数" << endl;
}

class BaseClass2 :public BaseClass1
{
protected:
int v3;
public:
BaseClass2();
BaseClass2(int);
BaseClass2(int, int, int);
~BaseClass2();
};

BaseClass2::BaseClass2()
{
cout << "BaseClass2 无参构造函数" << endl;
}

BaseClass2::BaseClass2(int m) :v3(m)
{
cout << "BaseClass2 带1个参构造函数" << endl;
}

BaseClass2::BaseClass2(int m, int n, int k) : BaseClass1(m, n), v3(k)
{
cout << "BaseClass2 带3个参构造函数" << endl;
}

BaseClass2::~BaseClass2()
{
cout << "BaseClass2 析构函数" << endl;
}

class DerivedClass :public BaseClass2
{
protected:
int v4;
public:
DerivedClass();
DerivedClass(int);
DerivedClass(int, int, int, int);
~DerivedClass();
};

DerivedClass::DerivedClass()
{
cout << "DerivedClass2 无参构造函数" << endl;
}

DerivedClass::DerivedClass(int k) :v4(k)
{
cout << "BaseClass2 带1个参构造函数" << endl;
}

DerivedClass::DerivedClass(int m, int n, int k, int t) : BaseClass2(m, n, k), v4(t)
{
cout << "DerivedClass 带4个参构造函数" << endl;
}

DerivedClass::~DerivedClass()
{
cout << "DerivedClass 析构函数" << endl;
}

int main()
{
cout << "无参对象的创建" << endl;
DerivedClass derviedCla;
system("pause");
return 0;
}

运行结果：

析构函数没有显示出来，后面应该显示如下：

DerivedClass2析构函数

BaseClass2析构函数

BaseClass1析构函数