刚学C++，怎么那么多错误呢

teacher(char *na,int ag,int se,int po,int sa);你看看你的函数参数是多么的不对应； student(char *na,int ag,int se,char *xh,char *cl)；参数都不对应；还有你的Person的大小写有的都错了，我给你修改下：
#include <iostream.h>
#include <string.h>
class Person
{
protected:
    char name[20];
    char sex;
    int  age;
public:
    Person(char *na,int ag,char  se)
    {
        strcpy(name, na);
        sex= se;
        age = ag;
    }
    void initname(char *na)
    {
        strcpy(name, na);
    }

    void initsex(char se)
    {
        sex=se;
    }

    void initage(int ag)
    {
        age=ag;
    }

    char * getname()
    {
        return name;
    }

    int getage()
    {
        return age;
    }

    char getsex()
    {
        return sex;
    }

    void printf()
    {
        cout<<"姓名:"<<name<<endl;
        cout<<"性别:"<<sex<<endl;
        cout<<"年龄:"<<age<<endl;
    }
};
class teacher:public Person
{
    char *post;
    int  salary;
public:
    teacher(char *na,int ag,char se,char *po,int sa):Person(na,ag,se)
    {
        post=po;
        salary=sa;
    }
    void printf()
    {
        Person::printf();
        cout<<"职位:"<<post<<endl;
        cout<<"工资:"<<salary<<endl;
    }
};
class student:public Person
{
    char xuehao[20];
    char Class[20];
public:
    student(char *na,int ag,char se,char *xh,char *cl):Person(na,ag,se)
    {
        strcpy(xuehao,xh);
        strcpy(Class,cl);
    }
    printf()
    {
        Person::printf();
        cout<<"学号:"<<xuehao<<endl;
        cout<<"班级:"<<Class<<endl;
    }
};
void main()
{
    teacher te("liang",22,'m',"教授",5000);
    student st("liang",22,'m',"20112111225","11B");
    te.printf();
    cout<<"__________________"<<endl;
    st.printf();
}
        

看了楼上的，怎么这么多不该犯的错误