수다닷컴

#include stdio.h
#includestring.h
#include stdlib.h
typedef struct grade{
char stu_name[20];
int stu_num;
float score[20], sum, average;
struct grade *next;
}grade;
char *sub_name[20];
int sub_num;
grade *root = 0;
void input(char *pname, int *st_num, float *sco);
void del();
void display();
void search();
int main()
{
int menu, stu_num;
int n=1;
int i;
char stu_name[20];
float score;

printf(과목수를 입력하시오. : );
scanf(%d, &sub_num);
printf(\n);

printf(과목명을 입력하시오. : \n);
for(i=0; isub_num; i++)
{
sub_name[i] = (char*)malloc(sizeof(char)*20);
scanf(%s, sub_name[i]);
}
root = (grade*)malloc(sizeof(grade));

strcpy(root-stu_name, ROOT);

root-next = NULL;

while(n)
{
printf(\n);
printf(************************************************\n);
printf(******************** 1.입력 ********************\n);
printf(******************** 2.삭제 ********************\n);
printf(******************** 3.출력 ********************\n);
printf(******************** 4.검색 ********************\n);
printf(******************** 5.종료 ********************\n);
printf(************************************************\n);
printf(Select Number : );
scanf(%d, &menu);
switch(menu)
{
case 1:
input(stu_name, &stu_num, &score);
break;
case 2:
del();
break;
case 3:
display();
break;
case 4:
search();
break;
default :
printf(프로그램을 종료합니다.\n);
n = 0;
break;
}
}
free(root);
return 0;
}

void input(char *pname, int *st_num, float *sco)
{
int i;
grade *p, *pnew;
p = root;
printf(학생의 정보를 입력하시오.\n);
printf(\n이름 : );
scanf(%s, pname);
printf(\n학번 : );
scanf(%d, st_num);
for(i=0; isub_num; i++)
{
printf(\n%s성적 : , sub_name[i]);
scanf(%f, sco);
}

printf(\n!!입력 완료!!);

while(p-next)
{
p = p-next;
}
pnew = (grade*)malloc(sizeof(grade));
strcpy(pnew-stu_name, pname);
pnew-stu_num = *st_num;
for(i=0; isub_num; i++)
pnew-score[i] = *sco;
pnew-next = NULL;
p-next = pnew;
}
void del()
{
grade *p, *temp, *before;
temp = (grade*)malloc(sizeof(grade));
int del_stu_num = 0;
printf(\n데이터 삭제할 학번 입력 : );
scanf(%d, &del_stu_num);
p = root;
p = p-next;
before = root;
while(p != 0)
{
if(p-stu_num == del_stu_num)
{
temp = p;
before-next = p-next;
p = before;
free(temp);
printf(\n!!데이터 삭제 완료!!\n);
}
before = p;
p = p-next;
}
}
void display()
{
grade *p;
p = root;
p = p-next;

if(p == 0)p == 0)
printf(\n!!출력할 데이터가 없습니다!!\n);

while(p != 0)
{
int i;
float sum = 0, aver = 0;

printf(\n===============================================\n);
printf(\n이름 : %s, 학번 : %d, p-stu_name, p-stu_num);

for(i=0; isub_num; i++)
{
printf(\n%s성적 : %.2f, sub_name[i], p-score[i]);
sum += p-score[i];
}

aver = p-sum/sub_num;
printf(\n합계 : %.2f , 평균 : %.2f\n, sum, aver);
printf(\n===============================================\n);
p = p-next;
}
}
void search()
{
grade *p, *temp;
temp = (grade*)malloc(sizeof(grade));
int del_stu_num = 0;

printf(\n찾을 학번을 입력하시오. : );
scanf(%d, &del_stu_num);
p = root;
p = p-next;
while(p != 0)
{
if(del_stu_num == p-stu_num)
{
int i;
float sum = 0, aver = 0;

printf(\n!!데이터 발견!!\n);
printf(\n===============================================\n);
printf(\n이름 : %s, 학번 : %d, p-stu_name, p-stu_num);

for(i=0; isub_num; i++)
{
printf(\n%s성적 : %.2f, sub_name[i], p-score[i]);
sum += p-score[i];
}
aver = sum/sub_num;
printf(\n합계 : %.2f , 평균 : %.2f\n, sum, aver);
printf(\n===============================================\n);
break;
}else if(del_stu_num != p-stu_num){
printf(\n!!찾는 학번이 없습니다!!\n);
break;
}
}
}

과목명과 각 과목 성적, 학생 이릅, 학번을 입력받아서 처리하는 프로그램을 만들려고하는데
display하고 search에서 각 과목 성적과 합계하고 평균을 출력하는 부분에서 제대로 되지않아서 그러는데
가르침 부탁드립니다. ㅠㅠ

신청하기