/* Filename:  grade1.cpp

   Author:  Br. David Carlson
            Br. Isidore Minerd

   Date:  January 4, 2000

   Modified:  June 26, 2000; August 19, 2001; July 16, 2009

   This program asks the user to enter a number grade between 0 and 100.
   It then computes and prints the corresponding letter grade (A, B, C,
   D, or F).

   Tested with:
      Microsoft Visual C++ 6.0
      Microsoft Visual C++ .NET
	  Microsoft Visual Studio 2008
      g++ under Linux
*/

#include <iostream>
using namespace std;


int main(void)
   {
   int Num;
   char Grade;

   cout << "Enter your number grade (integer from 0 to 100): ";
   cin >> Num;

   if ((Num < 0) || (Num > 100))
      Grade = 'N';
   else if (Num >= 90)
      Grade = 'A';
   else if (Num >= 80)
      Grade = 'B';
   else if (Num >= 70)
      Grade = 'C';
   else if (Num >= 60)
      Grade = 'D';
   else
      Grade = 'F';

   cout << endl << "The letter grade is: " << Grade << endl;

   if (Grade == 'N')
      cout << "N stands for invalid.  "
         << "You must use a number between 0 and 100." << endl;

   return 0;
   }