3hu2Be - Online C Compiler & Debugging Tool

#include <stdio.h>
#define MAX 3

struct stu
{ int ID;
float kor, eng, math;
float avg;
char grade;};

int main(void) {

	struct stu s[MAX];
	int i,j;
	float korsum=0, engsum=0, mathsum=0;
	printf("학번, 점수(국어, 영어, 수학)을 입력하세요.\n");

	for (i=0;i<MAX;i++)
	{
		scanf("%d %f %f %f", &s[i].ID, &s[i].kor, &s[i].eng, &s[i].math);
	}

	printf("\n입력된 점수\n");
	for(i=0;i<MAX;i++)
	{
		printf("%d %5.2f %5.2f %5.2f\n",s[i].ID,s[i].kor,s[i].eng, s[i].math);
	}
for (i=0;i<MAX;i++)
{
	s[i].avg=(s[i].kor+s[i].eng+s[i].math)/3.0;
	korsum+=s[i].kor;
	engsum+=s[i].eng;
	mathsum+=s[i].math;
}
for (i=0;i<MAX;i++)
{
	if (s[i].avg>=90)
	s[i].grade='A';
	else if (s[i].avg>=80)
	s[i].grade='B';
	else if (s[i].avg>=70)
	s[i].grade='C';
	else if (s[i].avg>=60)
	s[i].grade='D';
	else
	s[i].grade='F';
}
printf("\n**성적**\n");
for (i=0;i<MAX;i++)
printf("학번 : %5d\t평군: %5.2f\t학점 :%c\n", s[i].ID,s[i].avg, s[i].grade);

printf("\n**과목별 평균**\n");
printf("국어:%5.2f 영어:%5.2f\n 수학:%5.2f",korsum/MAX, engsum/MAX, mathsum/MAX);

	return 0;
}