#include <stdio.h>
main (void) {
     int a,b,c,total;
     printf("\n------------------------------------");
      printf("\n\t\tโปรแกรมการตัดเกรด ");
      printf("\n------------------------------------\n"); 
     printf("\n คะแนนระหว่างเรียน เต็ม 60 คะแนน = ");
     scanf("%d",&a); 
     printf("\n คะแนนกลางภาค เต็ม 20 คะแนน = ");
     scanf("%d",&b); 
     printf("\n คะแนนปลายภาค เต็ม 20 คะแนน = ");
     scanf("%d",&c); 
total = a+b+c;
printf("คะแนนรวม = %d", total) ;
if (total >= 80)
  printf("\n คุณได้เกรด A");
else
  if(total >= 70)
   printf("\n คุณได้เกรด B+");
  else
   if(total >= 60)
    printf("\n คุณได้เกรด B");
   else
    if(total >= 50)
     printf("\n คุณได้เกรด C+");
    else
     if(total >= 40)
      printf("\n คุณได้เกรด C");
     else
      if(total >= 30)
       printf("\n คุณได้เกรด D+");
      else
       if(total >= 20)
        printf("\n คุณได้เกรด D");
       else
         printf("\n คุณได้เกรดF");
printf("\n-------------------------------") ;
printf("\nนางสาวกันยาลักษณ์ ดารินทร์ ชั้นม.5/2 เลขที่ 17");
printf("\n------------------------------") ;
return 0;
    }

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