学生多态

来源：互联网发布：聚宝盆营销软件编辑：程序博客网时间：2024/05/29 12:20

#include<stdio.h>                                                                                                                                                                                                                                                                                   #include <iostream>#include<string>#include<stdlib.h> using namespace std;class student{public:        string name;  string num;  string duixiang;  student(string n,string m,string d):name(n),num(m),duixiang(d){}virtual void display()  {}};class UnderGrad:public student{public: virtual void creatlb() {}UnderGrad(string n,string m,string d):student(n,m,d){} virtual void display() { cout<<"学生信息："<<endl; cout<<"本科生："<<endl;     cout<<"学号:"<<num<<endl;     cout<<"姓名:"<<name<<endl;     cout<<endl; }string getname(){    return name;} };class Graduate:public student{public:    string ds;  virtual void creatlb() {}Graduate(string n,string m,string d,string s):student(n,m,d),ds(s){}virtual void display()  {cout<<"信息:"<<endl;cout<<"研究生："<<endl;    cout<<"学号:"<<num<<endl;    cout<<"姓名:"<<name<<endl;    cout<<"导师姓名:"<<ds<<endl;    cout<<endl; }};typedef struct _studentlist{           student *data;        struct _studentlist * next;}studentlist,*studentlis;int creatklb(studentlist *&L){    L= new studentlist; if(!L) {       return 0;  }       L->next = NULL;       return 1; } studentlis CreateList(studentlis L,student **ptr)   {    studentlist* p = new studentlist;      p->data=*ptr;    p->next = NULL;  p->next=L->next;L->next=p;    return L; } void displays(student *ptr){    ptr->display();}studentlis caidan(studentlis &L,student **ptr){    studentlis l=L;string n1,m1,d1,d2;char slect;do {    cout<<"（u）UnderGrad，（g）Graduate，（e）end"<<endl;    cin>>slect;    switch(slect)    {    case 'u':    cout<<"本科生："<<endl;    cout<<"学号：";    cin>>n1;    cout<<"姓名：";    cin>>m1;    d1="bks";    *ptr=new UnderGrad(m1,n1,d1);    CreateList(l,ptr);     break;    case 'g':    cout<<"研究生："<<endl;    cout<<"学号：";    cin>>n1;    cout<<"姓名：";    cin>>m1;    cout<<"导师姓名:";    cin>>d2;    d1="bks";    *ptr=new Graduate(m1,n1,d1,d2);    CreateList(l,ptr);    break;    case 'e':    cout<<"遍历"<<endl;studentlis lwl =l;while(lwl->next )   {    lwl=lwl->next;    lwl->data->display();    cout<<endl;   }break;     }}   while(slect!='e');return L;}int main(){    studentlist *l;    student *ptr;    creatklb(l);    caidan(l,&ptr);    return 0;}

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