f1001.cpp

it is a usefull thing

//=====================================
// f1001.cpp
// 继承
//=====================================
#include<iostream>
using namespace std;
//-------------------------------------
class Advisor{ 
  int noOfMeeting;
};//-----------------------------------
class Student{
  string name;
  int semesterHours;
  double average;
public:
  Student(string pName="noName"):name(pName),average(0),semesterHours(0){}
  void addCourse(int hours, double grade){
    double totalGrade = (semesterHours * average + grade);   //总分
    semesterHours += hours;                                        //总修学时
    average = semesterHours ? totalGrade/semesterHours : 0; //平均分
  }
  void display(){
    cout<<"name=\""<<name<<"\""<<", hours="<<semesterHours
         <<", average="<<average<<"\n";
  }
  int getHours(){ return semesterHours; }
  double getAverage(){ return average; }
};//-----------------------------------
class GraduateStudent : public Student{
  Advisor advisor;
  int qualifierGrade;
public:
  int getQualifier(){ return qualifierGrade; }
};//-----------------------------------
int main(){
  Student ds("Lo lee undergrade");
  GraduateStudent gs;
  ds.addCourse (3, 2.5);
  ds.display();
  gs.addCourse(3, 3.0);
  gs.display();
}//====================================