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

class Person{
protected:
    char Name[10];
    char Sex;
    int Age;
public:
    void Register(char *name,int age,char sex);
    void ShowMe();
};

class Teacher:public Person{
    char Dept[20];
    int Salary;
public:
    Teaher(char *name,int age,char sex,char *dept,int salary);
    void ShowMe();
};

class Student:public Person{
    char ID[12];
    char Class[12];
public:
    Student(char *name,int age,char sex,char *id,char *classid);
    void ShowMe();
};

void Person::Register(char *name, int age,char sex){
    strcpy(Name,name);
    Sex=(sex=='m'?'m':'f');
    Age=age;
}
void Person::ShowMe(){
    cout<<"姓 名："<<Name<<endl;
    cout<<"性 别："<<(Sex=='m'?"男":"女")<<endl;
    cout<<"年 龄："<<Age<<endl;
}
Teacher::Teaher(char *name,int age,char sex,char *dept,int salary){
    Teacher::Register(name,age,sex);
    strcpy(Dept,dept);
    Salary=salary;
}
Student::Student(char *name,int age,char sex,char *id,char *classid){
    Student::Register(name,age,sex);
    strcpy(ID,id);
    strcpy(Class,classid);
}
void Student::ShowMe(){
    cout<<"学 号："<<ID<<endl;
    Person::ShowMe();
    cout<<"班 级："<<Class<<"\n\n";
}

void main(){
    Teacher empl("章立早",38,'m',"电信学院",2300);
    Student stdl("李木子",22,'f',"02035003","能动01");
    empl.ShowMe();
    stdl.ShowMe();
}
编译如下：
--------------------Configuration: PersonTeacherStudent - Win32 Debug--------------------
Compiling...
PTS.CPP
F:\vc++\vc++程序\MyObject\PersonTeacherStudent\PTS.CPP(58) : error C2661: 'Teacher::Teacher' : no overloaded function takes 5 parameters
执行 cl.exe 时出错.

PersonTeacherStudent.exe - 1 error(s), 0 warning(s)
看不懂什么意思/

# include<iostream>
# include<string>
using namespace std;
class Person{
protected:
    char Name[10];
    char Sex;
    int Age;
public:
    void Register(char *name,int age,char sex);
    virtual void ShowMe();
};

class Teacher:public Person
{
    char Dept[40];
    int Salary;
public:
    Teacher(char *name,int age,char sex,char *dept,int salary);
    void ShowMe();
};

class Student:public Person
{
    char ID[12];
    char Class[12];
public:
    Student(char *name,int age,char sex,char *id,char *classid);
    void ShowMe();
};

void Person::Register(char *name, int age,char sex){
    strcpy(Name,name);
    Sex=(sex=='m'?'m':'f');
    Age=age;
}
void Person::ShowMe(){
    cout<<"姓 名："<<Name<<endl;
    cout<<"性 别："<<(Sex=='m'?"男":"女")<<endl;
    cout<<"年 龄："<<Age<<endl;
}
Teacher::Teacher(char *name,int age,char sex,char *dept,int salary){

    Person::Register(name,age,sex);
    strcpy(Dept,dept);
    Salary=salary;
}
Student::Student(char *name,int age,char sex,char *id,char *classid){
    Student::Register(name,age,sex);
    strcpy(ID,id);
    strcpy(Class,classid);
}
void Student::ShowMe(){
    cout<<"学 号："<<ID<<endl;
    Person::ShowMe();
    cout<<"班 级："<<Class<<"\n\n";
}
void Teacher::ShowMe(){
    cout<<"系别："<<Dept<<endl;
    Person::ShowMe();
    cout<<"工资："<<Salary<<"\n\n";
}

void main()
{
    Teacher tc("章立早",38,'m',"电信学院",2300);
    Student stdl("李木子",22,'f',"02035003","能动01");
    tc.ShowMe();
    stdl.ShowMe();
}
这个是修改后的，你的错误就是你的Teacher::Teaher(char *name,int age,char sex,char *dept,int salary){，还有一个就是你没有Teacher的ShowMe（）函数

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

class Person{
protected:
    char Name[10];
    char Sex;
    int Age;
public:
    void Register(char *name,int age,char sex);
    void ShowMe();
};

class Teacher:public Person{
    char Dept[20];
    int Salary;
public:
    Teacher(char *name,int age,char sex,char *dept,int salary);
    void ShowMe();
};

class Student:public Person{
    char ID[12];
    char Class[12];
public:
    Student(char *name,int age,char sex,char *id,char *classid);
    void ShowMe();
};

void Person::Register(char *name, int age,char sex){
    strcpy(Name,name);
    Sex=(sex=='m'?'m':'f');
    Age=age;
}
void Person::ShowMe(){
    cout<<"姓 名："<<Name<<endl;
    cout<<"性 别："<<(Sex=='m'?"男":"女")<<endl;
    cout<<"年 龄："<<Age<<endl;
}

Teacher::Teacher(char *name,int age,char sex,char *dept,int salary){
    Person::Register(name,age,sex);
    strcpy(Dept,dept);
    Salary=salary;
}
Student::Student(char *name,int age,char sex,char *id,char *classid){
    Person::Register(name,age,sex);
    strcpy(ID,id);
    strcpy(Class,classid);
}
void Student::ShowMe(){
    cout<<"学 号："<<ID<<endl;
    Person::ShowMe();
    cout<<"班 级："<<Class<<"\n\n";
}
void Teacher::ShowMe(){
    cout<<"学 院："<<Dept<<endl;
    Person::ShowMe();
    cout<<"工 资："<<Salary<<"\n\n";
}

void main(){
    Teacher empl("章立早",38,'m',"电信学院",2300);
    Student stdl("李木子",22,'f',"02035003","能动01");
    empl.ShowMe();
    stdl.ShowMe();
}

改了，才发现和2楼一样，还是发上去啦！2楼说的好！

谢谢你的帮助