Thread: Error saying missing function prototype, though Iv'e declared it

The program keeps telling me that I need to declare a function prototype for initialise_com_port
But Iv'e done that, can anyone tell me what's going on?

Code:

#include <stdio.h>
#include <process.h>
#include <conio.h>

void initialise_com_port();
void sort_bytes();
void create_screen();
void create_file();

char reply, key;

int main()
{
   initialise_com_port();

   getch();
   return 0;
}

void initialise_com_port()
{
   printf("     PACKET CAPTURE, DISPLAY AND STORE-TO-DISK PROGRAM\n\n");
   printf("       THIS PC WILL CAPTURE 9600 BIT/S DATA COMING IN\n");
   printf("       ON SERIAL PORT COM1 AND DISPLAY THE DATA\n\n\n");
   printf("     Type C and then press Enter to capture and display: ");
   scanf("%c", reply);

   if (reply == 'C')
   {
      clrscr;
      printf("Below are given the values of the bytes in the data field");
      printf(" of each identified packet.\n\n");
      sort_bytes();
      create_screen();
      printf("To store to disk, type D and then press Enter.\n");
      printf("Not to store to disk but to capture again type C and press");
      printf(" Enter\n");
      printf("To return to DOS, type F and then press Enter TWICE");
      scanf("%c", key);


      if (key == 'C')
      {
         sort_bytes();
         create_screen();
      }

      if (key == 'D')
      {
         create_file();
      }

      if (key == 'F')
      {
         printf("You have decided to exit from the program.");
         printf("\nPress Enter");
      }


      else
      {
         printf("You did not enter C. Program assumes you want to exit");
      }
   }
}

void sort_bytes()
{
   printf("Hello from sort_bytes!");
}

void create_screen()
{
   printf("Hello from create_screen!");
}

void create_file()
{
   printf("Hello from create_file!");
}

The error I get is that clrscr is not defined. I comment that out and it builds fine.

I'm using VC++ .NET to compile.

The program makes perfect sense. I read over and compiled it and its fine. There might be some setting in Borland that needs tweaking to work right, but I have never used Borland so I can't help you there.

You can also try downloading a free C/C++ compiler and trying that out.

maybe you forgot the () after clscr

Code:

clscr()

maybe it isn't in your conio.h because it isn't standard.
There doesn't have to be anything in their like what I use doesn't even have that function.

i also have bcb6
i changed

Code:

void initialise_com_port();
void sort_bytes();
void create_screen();
void create_file();

to

Code:

void initialise_com_port(void);
void sort_bytes(void);
void create_screen(void);
void create_file(void);

and changed

Code:

clscr;

to

Code:

clscr();

and it came back with no warnings at all

i compiled it as c and it had the same warning about the function prototype
it must be a borland thing