student

#include <iostream>

using namespace std;

class Student
{
private:
  int roll;
  string name;
  int mathMasks;
  int phyMasks;
  int chemMasks;
public:
  Student(int r, string name, int m, int p, int c) {
    roll = r;
    this->name = name;
    mathMasks = m;
    phyMasks = p;
    chemMasks = c;
  }
  int total() {
    return mathMasks + phyMasks + chemMasks;
  }
  char grade() {
    float average = total()/3;
    if ( average > 60 ) return 'A';
    else if ( average > 40 ) return 'B';
    else return 'C';
  }
  ~Student(){};
};

void main() {
  int roll;
  string name;
  int m, p, c;
  cout << "Enter the roll number " 
  cin >> roll;
  cout << "Enter the student name "
  cin >> name;
  cout << "Enter the math score "
  cin >> m;
  cout << "Enter the physics score "
  cin >> p;
  cout << "Enther the chemics score "
  cin >> c;
  Student s(roll, name, m, p, c);
  cout << "The total score of this student is " << s.total() << endl;
  cout << "The grade of this student is " << s.grade() << endl;
}