#include<iostream>
#include<string>
using namespace std;
class Person
{
public:
    Person(char* n,int age,char *sex)
    {
      strcpy(N,n);Age=age;strcpy(Sex,sex);
    }
    ~Person(){}
    char *Getname(){return N;}
    int GetAge(){return Age;}
    char *GetSex(){return Sex;}
private:
    char *N;
    int Age;
    char *Sex;
};
class Student:public Person
{
public:
    Student(char *n,int age,char *sex,double score): Person(n, age, sex),Score(score)
    {}//Score=score;}
    ~Student(){}
    float GetScore(){return Score;}
private:
    double Score;
};
void main()
{
    Student y("zhangsan",58,"男",92.1);
    cout<<"Student的姓名为："<<y.Getname()<<"年龄为："<<y.GetAge()<<"性别为："<<y.GetSex()<<"分数为："<<y.GetScore()<<endl;
}
编译没错误，运行的时候就出现错误了！！
刚学c++的继承与派生，结果同学说要我帮他改，我看了就觉得是构造函数里面指针可能错了，不过不知道怎么改，也不知道对不对，大家帮下忙，谢谢

#include<iostream>
#include<string>
using namespace std;
class Person
{
public:
    Person(char* n,int age,char* sex)
    {
      N=new char[strlen(n)+1];
      strcpy(N,n);
      Age=age;
      Sex=new char[strlen(sex)+1];
      strcpy(Sex,sex);
    }
    ~Person(){}
    const char *Getname(){return N;}
    const int GetAge(){return Age;}
    const char *GetSex(){return Sex;}
private:
    char *N;
    int Age;
    char *Sex;
};
class Student:public Person
{
public:
    Student(char *n,int age,char *sex,double score): Person(n, age, sex),Score(score)
    {}//Score=score;}
    ~Student(){}
    float GetScore(){return Score;}
private:
    double Score;
};
void main()
{
     Student y("zhangsan",58,"男",92.1);
    cout<<"Student的姓名为："<<y.Getname()<<"年龄为："<<y.GetAge()<<"性别为："<<y.GetSex()<<"分数为："<<y.GetScore()<<endl;
}

我对指针不太懂，请问二楼为什么这样写啊？

N=new char[strlen(n)+1];
      strcpy(N,n);
这句话的意思就是把指针n指向的值复制给N，相当于赋值！而且指针还可以指向一个字符串数组。N=new char[strlen(n)+1];这句就是给N分配strlen(n)+1这么大的空间！

[ 本帖最后由 qlc00 于 2009-11-14 16:27 编辑 ]

Person(char* n,int age,char *sex)
    {N=new char[strlen(n)+1];
    Sex=new char[strlen(sex)+1];
      strcpy(N,n);Age=age;strcpy(Sex,sex);
    }
    ~Person(){delete[]N,Sex}
改这些就够了