为啥出现这个错误，在等

问题遇到的现象和发生背景

问题相关代码，请勿粘贴截图

#include"iostream"
using namespace std;
class Teacher{
    public:
        virtual double salary();
        virtual void print();
};
class lecturer:public Teacher{
    public:
        double h;
        double j;
        double mh;
        lecturer(double h1=0,double j1=0,double mh1=0):h(h1),j(j1),mh(mh1){}
        double salary();
        void print();    
};
double lecturer:: salary()
{
    return(h*mh+j);
}
void lecturer:: print()
{
    cout<<"Lecturer salary:"<<salary()<<endl;
}
class AssociateProfessor:public Teacher{
    public:
        double h;
        double j;
        double mh;
        double bt;
        AssociateProfessor(double h1=0,double j1=0,double mh1=0,double bt1=0):h(h1),j(j1),mh(mh1),bt(bt1){}
        double salary();
        void print();    
};
double AssociateProfessor:: salary()
{
    return(h*mh+j+bt);
}
void AssociateProfessor:: print()
{
    cout<<"AssociateProfessor salary:"<<salary()<<endl;
}
class Professor:public Teacher{
    public:
        double h;
        double j;
        double mh;
        double bt;
        Professor(double h1=0,double j1=0,double mh1=0,double bt1=0):h(h1),j(j1),mh(mh1),bt(bt1){}
        double salary();
        void print();    
};
double Professor:: salary()
{
    return(h*mh+j+bt);
}
void Professor:: print()
{
    cout<<"Professor salary:"<<salary()<<endl;
}
int main()
{
    Teacher t;
    lecturer l;
    AssociateProfessor a;
    Professor p;
    Teacher *pt=&t;
    pt=&l;
    pt->print();
    pt=&a;
    pt->print();
    pt=&p;
    pt->print();
    return 0;
}

运行结果及报错内容

我的解答思路和尝试过的方法

我想要达到的结果

上一个运行的窗口没关闭