c5_6.c

适合于初学者的C程序

/* Note:Your choice is C IDE */
#include "stdio.h"
void main()
{float score;
 char  grade;
 printf("input student's score:");
 scanf("%f",&score);
 while(score>100||score<0)
 {
 	printf("\n error input,input again");
 	scanf("%f",&score);
 }
 switch((int)(score/10))
 {
 	case 10:
 	case  9: grade='A';break;
 	case  8: grade='B';break;
 	case  7: grade='c';break;
 	case  6: grade='D';break;
 	case  5:
 	case  4:
 	case  3:
 	case  2:
 	case  1:
 	case  0: grade='E';
 }
 printf("Grade is %5.1f,corresponding level is %c. \n",score,grade);
    
}