#include <stdio.h>
#include <math.h>


void message(char grade) {

/* grade is one of 'A','B', 'C', 'D', 'F' */

  switch (grade)   {
     case 'O' :

     case 'A' : { printf("Excellent!\n");
                  break;  
                 }
     case 'B' : { printf("Good!\n");
                  break; 
                 }
     case 'C' : { printf("Meh\n");
                  break;
                 }
     case 'D' : { printf("Not Good )-: \n");
                  break; 
                }
     case 'F' : { printf("Really Really BAD!\n");
                  break;
                 }
     default: { printf ("NOT a grade!\n");
               } 
  }

  return;

}

char convert(int grade) {

  int stump;

  stump = grade / 10;  /* INT division! */

  switch (stump) {
    case 10:
    case 9 : {return 'A';}
    case 8 : {return 'B';}
    case 7 : {return 'C';}
    case 6 : {return 'D';}
    default: {return 'F';}

  }
   return(-1);  
}

int quickTest(int x) {

 switch (x < 3){
   case 0 : {printf("BIG\n");

             break;
            }
   case 1 : {printf("SMALL\n");break;}
 }
  
 return 1;


}



int main() {

  message(convert(72));
  message(convert(49));
  message(convert(100));
  message(convert(88));
  message(convert(91));

  quickTest(4);
  quickTest(2);

  return 0;
}