#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main(void)
{
int score;
char grade;
printf("¼ºÀûÀ» ÀÔ·ÂÇϽÿÀ: ");
scanf("%d", &score);
if (score >= 90)
grade = 'A';
else if (score >= 80)
grade = 'B';
else if (score >= 70)
grade = 'C';
else if (score >= 60)
grade = 'D';
else
grade = 'F';
printf("ÇÐÁ¡ %c \n", grade);
return 0;
}