项目四 用类处理“学生成绩”的问题

/*
*copyright (c) 2015,
*All rights reserved
*The Author:王争取
*Finished Time:2015.3.23
*/
#include <iostream>
using namespace std;
class Student
{
public:
    void setstudent(string,double,double);
    void show();
    void setName(string);
    string getName();
    double sum();
    double average();
private:
    string name;
    double chinese;
    double match;
};
void Student::setstudent(string nam,double chin,double mat)
{
    name=nam;
    chinese=chin;
    match=mat;
}
double Student::sum()
{
    return(chinese+match);
}
double Student::average()
{
    return (sum()/2);
}
void Student::setName(string nam)
{
    name=nam;
}
string Student::getName()
{
    return name;
}
void Student::show()
{
    cout<<"name:  "<<name<<endl;
    cout<<"scorce:  "<<"chinese: "<<chinese<<"  match: "<<match<<endl;
    cout<<"sum: "<<sum()<<"  average: "<<average()<<endl;
}
int main()
{
    Student stu1,stu2;
    stu1.setstudent("lin daiyu",98,96);
    stu2.setstudent("jia baoyu",90,88);
    stu1.show();
    stu2.show();
    stu1.setName("xue baochai");
    stu1.show();
    cout<<"stu1.name:"<<stu1.getName()<<endl;
    cout<<"stu1.average:"<<stu1.average()<<endl;
    return 0;
}