c语言输入成绩怎么判断等级

#include <stdio.h>
int main()
{
	int i;
	scanf("%d",&i);
	i/=10;
	switch(i){
		case 9:
			printf("A");
			break;
		case 8:
			printf("B");
			break;
		case 7:
			printf("C");
			break;
		case 6:
			printf("D");
			break;
		default:
			printf("E");
			break;
	}
	return 0; 
}

#include <stdio.h>
int main()
{
	int score;
	scanf("%d",&score);
	if(score>=90)printf("A");
	else if(score>=80)printf("B");
	else if(score>=70)printf("C");
	else if(score>=60)printf("D");
	else printf("E");
	return 0; 
}