void Course::Addstudent(Student& s){
Node* p=new Node;
p->Studentname=s.Getname();
p->grade=0;
p->next=studentlist;
studentlist=p;
}
void Course::Setgrade(Student& s,float a){
int i;
Node* p;p=studentlist;
for(i=0;i<studentnum;i++){
if(strcmp(s.Getname(),p->Studentname)==0){
p->grade=a;
cout<<"scessfully"<<endl;
exit(0);
}
}
}
float Course::Getstudentgrade(Student& s){
int i;
Node* p;p=studentlist;
for(i=0;i<studentnum;i++){
if(strcmp(s.Getname(),p->Studentname)==0)
return p->grade;
p=p->next;
}
cout<<"can't find student"<<endl;
return 0;
}