簡單的派生類的構造函數

#include<iostream>

#include<string>

using namespace std;

class stu

{

public:

     stu(int num,int age,string str)

{

n=num;

a=age;

s=str;

cout<<"基類構造函數執行!\n";

}

~stu()   {cout<<"基類析構函數執行!\n" ;};

protected:

int n;

int a;

string s;

};

class stu1:protected stu

{

public:

stu1(int num,int age,string str,char ch):stu(num,age,str)

{

c=ch;

cout<<"派生類函數構造函數執行!\n";

}

~stu1()  {cout<<"派生類析構函數執行!\n";};

void display()

{

cout<<"num:"<<n<<endl;

cout<<"age:"<<a<<endl;

cout<<"str:"<<s<<endl;

cout<<"ch:"<<c<<endl;

}

private:

char c;

};

int main()

{

stu1 ss(5,6,"hello",'m');

ss.display();

return 0;

}