c头文件的编程结构

Question

how to get input for structure inside a header file. i am getting an error when trying to ask the user for input in the header file.

#include "input.h"
struct planecat{
char seat_Id;   //id num of seat
int seatmark;  //seat availability 
char first_holdr[20]; //first name of the seat holder
char last_holdr[20];  //last name of the seat holder 
};


int main(){ struct planecat aisle[6],window[6];
select_b(aisle,window);}

insideheader

 void input(struct planecat aisle[6],struct planecat window[6]){
 {
   int i;
   printf("enter name");
   scanf("%i",&aisle[i].first_holdr);}

the program is giving me error by error C2036: 'planecat *' : unknown size

 error C2037: left of 'seatmark' specifies undefined struct/union 'planecat'

Answer 1

Definition should go before usage. You have to place struct planecat{...} at the beginning of header file (preferred), or before #include "input.h" (bad style).

Answer 2

put these

struct planecat{
char seat_Id;   //id num of seat
int seatmark;  //seat availability 
char first_holdr[20]; //first name of the seat holder
char last_holdr[20];  //last name of the seat holder 
};

in the input.h , and before the void input…………

And I advise you to put your definition in your head file, and others in the cpp/c files