#include <iostream>
using namespace std;
struct student
{
    char name[20];
    int num;
    float score;
    char grade;
};
void func(student *sp)
{
    student *t;
    t=sp;
    for(;sp<t+3;sp++)
        {
            if(sp->score>=80&&sp->score<=100)
                sp->grade='A';
            else if(sp->score>=60&&sp->score<=80)
                sp->grade='B';
            else if(sp->score>=0&&sp->score<=60)
                sp->grade='C';
        }
}
int main() {
    student stu[3],*p;
    for(p=stu;p<stu+3;p++)
        {
            cout<<"输入三个学生信息:"<<endl;
            cout<<"姓名:"<<endl; cin.get(p->name,20);
            cout<<"学号:"<<endl; cin>>p->num;
            cout<<"分数:"<<endl; cin>>p->score;
            cin.get();
        }
    p=stu;
    func(p);
    cout<<"---------------------"<<endl;
    for(p=stu;p<stu+3;p++)
        {
            cout<<"学号"<<p->num<<"的同学 "<<p->name<<"等级是 "<<p->grade<<endl;
        }
    return 0;
}