멋있는 컴프 고수님들ㅠㅜ

제가 만든 프로그램이 class type 오류 이런것도 뜨고... 여러가지로 잘못 프로그래밍한것같은데

저의 비루한 실력으로는 알 수가 없네요ㅜㅡㅜ

특히나 친구가 seat seat[12]라는데 이게 뭔지도 모르겟고...ㅠㅠ

뒤에 "%s %s" 있는 곳도 빨간줄 뜨고............제발 도와주세요ㅠㅠ잘생긴 능력자님들 ..!!

#include<stdio.h>
#include<string.h>

#define NAME 20
#define SEAT 12

struct seat
{
 int inte;
 char first[NAME];
 char last[NAME];
};
 
int main(void)
{
 FILE *output;
 char answer;/*a,b,c,d,e,f 중에서 사용자가 고를 변수 지정*/
 int i, n, t;
 seat seat[SEAT];
 char dele[NAME];

 for (i=0;i<SEAT;i++)
  seat[i].inte=0;

 do
 {
  printf("\\nTo choose a function,enter its letter label :\\n");
  printf("a) Show number of empty seats \\n");
  printf("b) Show list if empty seats\\n");
  printf("c) Show list of reserved seats with last name\\n");
  printf("d) Assign a customer to a seat assignment\\n");
  printf("e) Delete a seat assignment");
  printf("f) Quit\\n");
  scanf("%d",&answer);

  switch(answer)
  {
  case \'a\':
   n=0;
   for(i=0;i<SEAT;i++)
    if(seat[i].inte==0)
     n++;
   printf("The number of empty seats : %d",n);
   break;
  case \'b\':
   printf("Empty seat IDs :\\n");
   for(i=0;i<12;i++)
    if(seat[i].inte==0)
     printf("%d",1+i);
   break;
  case \'c\':
   printf("\\nResered Seats :\\n");
   for(i=0;i<SEAT;i++)
    if(seat[i].inte==1)
     printf("Seat [%d] : %s",i+1,seat[i].first);
   break;
  case \'d\':
   while(1){
    printf("Enter your preferred seat number :\\n");
    scanf("%d",&t);
    if(seat[t-1].inte==1)
     printf("Sorry! The seat has been already reserved! Choose another seat.");
    else
     break;
   };
   printf("Enter your first name :\\n");
   scanf("%s", seat[t-1].first);
   printf("Enter your last name : \\n");
   scanf("%s", seat[t-1].last);
   printf("\\n");
   printf("%s %s".seat[t-1].first, seat[t-1].last);
   seat[t-1].inte=1;
   break;
  case \'e\':
   while(1)
   {
    printf("Enter the seat number :\\n");
    scanf("%d",&t);
    if(seat[t-1].inte==0)
     printf("The seat is empty. You cannot delete it!\\n");
    else
     break;
   }  
    printf("Enter the last name : \\n");
    scanf("%s",dele);
    if(strcmp(dele,seat[t-1].last))
     printf("The last name is different. Deletion has been failed.\\n");
    else{
     printf("Deletion has been completed.\\n");
     seat[t-1].inte=0;}
    break;
  case \'f\':
   output=fopen("reservation.txt","w");
   for(i=0;i<SEAT;i++){
    if(seat[i].inte==0)
     fprintf(output, "Seat[%d]:Empty\\n",i+1);
    else
     fprintf(output,"Seat [%d]: Reserver by [%s %s]\\n",i+1,seat[i].first,seat[i].last);}
   fclose(output);
  }
 }while(answer!=\'f\');

 return 0;
}