# include <cstdlib>
# include <iostream>

using namespace std;

int main ( ) 
//
//  GRADE accepts a letter grade from the user, and prints out
//  the range of scores that will achieve that grade.
//
{
  char grade;

  cout << "Enter the letter grade: ";
  cin >> grade;

  switch ( grade )
  {
    case 'A':
    case 'a':
      cout << "Range for A is 90 to 100.\n";
      break;
    case 'B':
    case 'b':
      cout << "Range for B is 80 to 89.\n";
      break;
    case 'C':
    case 'c':
      cout << "Range for C is 70 to 79.\n";
      break;
    case 'D':
    case 'd':
      cout << "Range for D is 60 to 69.\n";
      break;
    case 'F':
    case 'f':
      cout << "Range for F is 0 to 59.\n";
      break;
    default:
      cout << grade << " is not a legal grade.\n";
  }


  return 0;
}