1. Input a 100 point score from the keyboard and output its grade according to the following principles: score ≥ 90, Grade A; 80 ≤ score ＜ 90, grade B; 70 ≤ score ＜ 80, grade C; 60 ≤ score ＜ 70, grade

 #include <stdio.h>
void main(){
	int    data;          
	char  grade;                    
	printf("Please enter the score:");
	scanf("%d”, &data);  
	switch(data/10)                   
	{   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("the grade is %c”,grade);
}