c++ program to calculate gpa.

#include<iostream>
using namespace std;
int main()



     {
         int grade;
         int hours;
         int points;
         int totalpoints;
         int possiblepoints;


       cout << "Enter your letter grade followed by the corresponding credit hours:\n ";
       cout << "When Finished entering grades, type j or J for your grade \n\n";
         while (grade != 'j' || grade != 'J')
        // Read grade and hours
       cin >> grade;

       if (grade == 'A'|| grade == 'a')
          points = 4, cin >> hours;
       else if (grade == 'B' || grade == 'b')
          points = 3, cin >> hours;
       else if (grade == 'C' || grade == 'c')
          points = 2, cin >> hours;
       else if (grade == 'D' || grade == 'd')
          points = 1, cin >> hours;
       else if (grade == 'F' || grade == 'f')
          points = 0, cin >> hours;
       else if (grade == 'j' || grade == 'J')
         { points =0;
           hours = 0;
         }
         else
           {  grade =0;
              points =0;
              hours =0;
              cout << "Please enter a valid grade" << endl;

       //Calculate Total Points


          totalpoints += (points * hours);



           possiblepoints += hours * 4 ;

    }
    return 0;
    }