#ifndef GRADE_H
#define GRADE_H
#include <iostream> //for class ostream
#include <string>   //for class string
using namespace std;

class grade {
	int i;   //in range 0 to n-1 inclusive; 0 means F, 13 means A
	static const int n {14};  //the number of possible grades
	static const string a[n]; //names of the grades: "F", "F+", ..., "A+"
public:
	grade(const string& s);
	grade& operator+=(int inc);
	friend ostream& operator<<(ostream& ost, const grade& g);
};

#endif