c++一直编译不通过

Question

学习虚拟类的一个例子，自己写一直编译不通过，不知道出什么问题了

#include <iostream>
#include <string.h>
using namespace std;
class person{
    public:
        Person(string nam,char s,int a)
        {
            name=nam;
            sex=s;
            age=a;
        }
        protected:
            string name;
            char sex;
            int age;
};
class Teacher:virtual public Person
{
    public:
        Teacher(string nam,char s,int a,string t):Person(nam,s,a){
            title=t;
        }
    protected:
        string title;
}
class Student:virtual public Person{
    public:
    Student(string nam,char s,float sco,int a):Person(nam,s,a),score(sco){}
    protected:
    float score; 
};
class Graduate:public Teacher,public Student
{
    public:
        Graduate(string nam,char s,int a,string t,float sco,float w):Person(nam,s,a),Teacher(nam,s,a,t),Student(nam,s,a,sco),wage(w){}
        void show(){
            cout<<"name:"<<name<<endl;
            cout<<"age:"<<age<<endl;
            cout<<"sex:"<<sex<<endl;
            cout<<"score:"<<score<<endl;
            cout<<"title:"<<title<<endl;
            cout<<"wage:"<<wage<<endl;
        }
    private:
        float wage;
};
int main()
{
    Graduate gra1("Yangchong",22,'m',"assisant",98,12000);
    gra1.show();
    return 0;
}

Answer 1

class person 类名是小写p，后面全都是大写P了

class Student前面缺个分号。