考坏了语文数学的学生

#include<iostream>#include<cstring>using namespace std;class Stu{private:   string name;    float chinese;    float math;public:   float average();    float sum();   void show();    void setStudent(string,float,float);    void setName(string);    string getName();}; string Stu::getName() {     return name ; }float Stu:: average(){     return ((chinese+math)/2.0);} float Stu::sum(){    return (chinese+math);}void Stu::show(){   cout<<"Name："<<name<<endl;   cout<<"Score："<<chinese<<'\t'<<math<<endl;}void Stu::setStudent(string n,float x,float y){    name =n;    chinese =x;    math =y;}void Stu::setName(string n){    name =n;}int main(){   Stu s1,s2;   s1.setStudent("Lin daiyu", 98, 96);    s2.setStudent("Jia baoyu", 90, 88);   s1.show();    s2.show();    s1.setName("xue baochai");    s1.show();    cout<<"s1.Name: "<<s1.getName()<<endl;    cout<<"s1.average: "<<s1.average()<<endl;    return 0;}