#include<stdio.h>
#include<string.h>

#define COURSE_CODE_SIZE 6 + 1
#define ARRAY_SIZE 100

void sortMarks(char [][ARRAY_SIZE], int [], int);

int main(void)
{

   char courseCode[COURSE_CODE_SIZE][ARRAY_SIZE];
   int mark[ARRAY_SIZE], counter = 0, i;
   FILE *fp_in;

   
   fp_in = fopen("grades.dat", "r");

   printf ("COURSE\tMARK\n\n");


   if ( fp_in == NULL )
   {
      printf ("Error openning file\n\n");
      exit (1);
   }
   else
   {
       while( 2 == fscanf(fp_in, "%[^;];%d\n", courseCode[counter], &mark[counter]) )
       {
           printf ("%s:\t%d\n", courseCode[counter], mark[counter]);
           counter++;
       }
   }

   printf ("\n\n");
   sortMarks(courseCode, mark, counter);
   fclose(fp_in);

   printf ("Sorted Marks (In Descending Order):\n\n");
   
   for ( i = 0; i < counter; i++)
     printf ("%s:\t%d\n", courseCode[i], mark[i]);

   printf ("\n\n");


   return 0;

} /*End of main() program */

void sortMarks(char courseCode[][ARRAY_SIZE], int mark[], int counter)
{

     char courseCodeTemp[COURSE_CODE_SIZE];
     int  markTemp;
     int i, j;

     for ( i = 0; i < counter; i++)
        for ( j = i + 1; j < counter; j++)
        {
           if ( mark[i] < mark[j] )
           {
              markTemp = mark[i];
              mark[i] = mark[j];
              mark[j] = markTemp;
              strcpy( courseCodeTemp, courseCode[i]);
              strcpy( courseCode[i], courseCode[j]);
              strcpy( courseCode[j], courseCodeTemp);
            }
         }

} /* End of sortMarks() Function */