编辑代码

#include <stdio.h>
int main ()
{
   int grade;
   printf ("\n\t***通过学生成绩，划分成绩等级***\n");
   printf("\n请输入学生成绩：");
   scanf ("%d",&grade); 

  if(grade > 100)
  {
      printf("\n\t*---请检查输入是否有误---*");
  }
  else
  {
      grade = grade / 10;
      switch (grade)
      {
      case 10:
      case 9: printf("\n\t--成绩等级：A");break;
      case 8: printf("\n\t--成绩等级：B");break;
      case 7: printf("\n\t--成绩等级：C");break;
      case 6: printf("\n\t--成绩等级：D");break;
      case 5: case 4: case 3: case 2: case 1: case 0:
      printf("\t--成绩等级:E\n");break;
      }
  }  
  return 0;
}