Help with my Grade Project - Fixed

[BaDDBLooD]

// Name: grade.cpp
// Author: Joel Zimmerman
// Date: May 05, 2005
// Description: Output's a letter grade based on the input of a percentage

// Thanks to Rob for the idea

// Note: the Case 10, Case 9 with the Break, took FOREVER to figure out.

#include <iostream>

int main()
{
   int percentage;
   char indicator;
   char grade;
   char value;
   int remainder;

   do
   {
      cout << endl << "Enter Percentage: ";
      cin >> percentage;

      switch (percentage / 10)
      {
         case 10:           // 100
         case 9:            // 90-99
            grade = 'A';
            break;
         case 8:            // 80-89
            grade = 'B';
            break;
         case 7:            // 70-79
            grade = 'C';
            break;
         case 6:            // 60-69
            grade = 'D';
            break;
         default:
            grade = 'F';    // 50
            break;
      }

      remainder = percentage % 10; // Wow, practical use for the modulus function, sweet! =)

      if (percentage >= 60 && percentage <= 93)
      {
         if (remainder >= 7)
         {
            value = '+';
         }
         else if (remainder <= 2) 
         {
            value = '-';
         }
      }
            
      cout << endl << percentage << "% is an " << grade << value << endl;
         
      cout << endl << "Would you like to enter any more percentages? (y or n)? ";
      cin >> indicator;
         
   } while((indicator == 'Y' || indicator == 'y'));
            
   return 0;
}

It doesn't seem to work as it should.