#include<stdio.h>
#include<string.h>
struct membershipinfo
{ char memberid;
 char id;
 char memberpw;
 char pw;
 char birth;
 char email;
};
 
 membershipinfo memberid[20];
 membershipinfo id[20];
 membershipinfo memberpw[20];
 membershipinfo pw[20];
 membershipinfo birth[20];
 membershipinfo email[20];
void menu()
{ int n;
 printf(\"1.로그인\\n\");
 printf(\"2.회원가입\\n\");
 scanf(\"%d\",&n);

 

}
int main()
{ struct membershipinfo ho;
 menu();
 
}
저게 전역변수로 선언하는건 알고있는데 자꾸 실행하면 에러가나서
문제점좀 알려주세요