一个类派生的问题

[piaopiaohu123]

#include <stdafx.h>
#include <iostream.h>
#include <string.h>
//using namespace std;

class Student
{
public:
Student(int n,string name)
{
num=n;
nam=name;
}

void display()
{
cout<<"num:"<<num<<endl;
cout<<"name:"<<name<<endl;
}
protected:
int num;
string name;
};

class Student1:public Student
{
Student1(int n,sring nam,int a):Student(n, name)
{
age=a;
}
void show()
{
display();
cout<<"age:"<<age<<endl;
}
private:
int age;

};

class Student2:public Student1
{
Student2(int n,string nam,int a,int s): Student1(n, nam, a)
{
score=s;
}
void show_all()
{
show();
cout<<"score:"<<score<<endl;
}
private:
int score;
};

int main()
{
Student2 stud(10010,"Li",17,89);
stud.show_all();

return 0;
}


大家帮我看看这个程序要怎么改，改了一晚上了，思路都乱了。。。谢谢了各位，小弟分不多。

[nickyjay0501]

#include <iostream>
#include <string>
using namespace std;

class Student
{
public:
Student(int n,string name)
{
num=n;
this->name=name;
}

void display()
{
cout <<"num:" <<num <<endl;
cout <<"name:" <<name <<endl;
}
protected:
int num;
string name;
};

class Student1:public Student
{
public:

Student1(int n,string name,int a):Student(n, name)
{
age=a;
}
void show()
{
display();
cout <<"age:" <<age <<endl;
}
private:
int age;

};

class Student2:public Student1
{
public:
Student2(int n,string nam,int a,int s): Student1(n, nam, a)
{
score=s;
}
void show_all()
{
show();
cout <<"score:" <<score <<endl;
}
private:
int score;
};

int main()
{
Student2 stud(10010,"Li",17,89);
stud.show_all();

return 0;
}

[mengde007]

#include <iostream> 
#include <string>
using namespace std; 
class Student 
{ 
public: 
	Student(int n,string nam):num(n),name(nam){}


void display() 
{ 
cout <<"num:" <<num <<endl; 
cout <<"name:"<<name<<endl; 
} 
protected: 
int num; 
string name; 
}; 

class Student1:public Student 
{ 
public:
Student1(int n,string nam,int a):Student(n, nam) { age=a; } 

void show() 
{ 
display(); 
cout <<"age:" <<age <<endl; 
} 
private: 
int age; 

}; 

class Student2:public Student1 
{ 
public:
	Student2(int n,string nam,int a,int s): Student1(n, nam, a),score(s){} 
 
void show_all() 
{ 
Student1::show(); 
cout <<"score:" <<score <<endl; 
} 
private: 
int score; 
}; 

int main() 
{ 
Student2 stud(10010,"Li",17,89); 
stud.show_all(); 

return 0; 
} 

[goodname]

class Student
{
public:
Student(int n,string name)
{
num=n;
this->name=name;
}

void display()
{
cout <<"num:" <<num <<endl;
cout <<"name:" <<name <<endl;
}
protected:
int num;
string name;
};

class Student1:public Student
{
public:
Student1(int n,string name,int a):Student(n, name)
{
age=a;
}
void show()
{
display();
cout <<"age:" <<age <<endl;
}
private:
int age;

};

class Student2:public Student1
{
public:
Student2(int n,string nam,int a,int s): Student1(n, nam, a)
{
score=s;
}
void show_all()
{
show();
cout <<"score:" <<score <<endl;
}
private:
int score;
};

int main()
{
Student2 stud(10010,"Li",17,89);
stud.show_all();

return 0;
}


自己对比下吧

[chenxu_ustc]

如果为了锻炼下使用继承 ,类可以向你这么组织
如果真正的设计类的话 ,看你的类里面 ,并没有因为多了的数据成员score 和age 使类产生了不同的行为
一般这种情况下 ,讲score 和age 也作为他的数据成员就好了,没必要继承

[goodname]

好像晚了一点点

[crst_zh]

楼主最大的问题是没有用virtual

[aaaa3105563]

帮顶··

[piaopiaohu123]

可是，小弟按照几位的程序，在VC6下面编译还是有点问题 fatal error C1010: unexpected end of file while looking for precompiled header directive

[goodname]

程序我是调试过的，能够运行，虽然未必是楼主要表达的意思，但是肯定不会出现这种错误。

你或者re-build一下，要么还是查查是否抄掉了什么东西。

[lingyin55]

#include <stdafx.h>

[Quote=引用 8 楼 piaopiaohu123 的回复:]
可是，小弟按照几位的程序，在VC6下面编译还是有点问题 fatal error C1010: unexpected end of file while looking for precompiled header directive
[/Quote]

[lingyin55]

或者不用包含#include <stdafx.h> 然后选择setting，在c/c++栏，选择PreCompiled headers，然后设置第一选项，选择不使用预编译头

[piaopiaohu123]

恩，试过了，加了#include <stdafx.h>
会出来这个E:\artic\msg\ChatRoom\static\static.cpp(71) : error C2629: unexpected 'class Student ('
E:\artic\msg\ChatRoom\static\static.cpp(71) : error C2334: unexpected token(s) preceding ':'; skipping apparent function body
E:\artic\msg\ChatRoom\static\static.cpp(81) : error C2146: syntax error : missing ';' before identifier 'name'
E:\artic\msg\ChatRoom\static\static.cpp(81) : error C2501: 'string' : missing storage-class or type specifiers
E:\artic\msg\ChatRoom\static\static.cpp(81) : error C2501: 'name' : missing storage-class or type specifiers
E:\artic\msg\ChatRoom\static\static.cpp(87) : error C2629: unexpected 'class Student1 ('
E:\artic\msg\ChatRoom\static\static.cpp(87) : error C2334: unexpected token(s) preceding ':'; skipping apparent function body
E:\artic\msg\ChatRoom\static\static.cpp(102) : error C2629: unexpected 'class Student2 ('
E:\artic\msg\ChatRoom\static\static.cpp(102) : error C2334: unexpected token(s) preceding ':'; skipping apparent function body
E:\artic\msg\ChatRoom\static\static.cpp(115) : error C2661: 'Student2::Student2' : no overloaded function takes 4 parameters