#include <stdio.h>
void main()
{int score;
 int temp; char grade;
 printf("enter score:");
 scanf("%d",&score);
 temp=score/10;
 switch(temp)
 {    case 10:
      case 9:grade='A';break;
      case 8:grade='B';break;
      case 7:grade='C';break;
      case 6:grade='D';break;
      default:grade='E';
  }
  printf("score=%d   grade=%c\n",score,grade);
}