题解 | #小乐乐转换成绩#

#include <stdio.h>
int main()
{
	int n = 0;
	int c = 0;
	scanf("%d", &n);
	c = n / 10;
	if (n >= 0)
	{
		switch (c)
		{
		case 10:
		case 9:printf("A"); break;
		case 8:printf("B"); break;
		case 7:printf("C"); break;
		case 6:printf("D"); break;
		case 5:
		case 4:
		case 3:
		case 2:
		case 1:
		case 0:printf("E"); break;
		default:printf("F"); break;
		}
	}
	else
	{
		printf("F");
	}
		
	return 0;
}