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.

I'll try the same, thanks, I'm using Borland C++ builder ver 6

EDIT: same error still, to me this program makes sense, then again, I'm just a beginner.

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

Probably means that the code was being compiled as "C++" rather than "C"

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

You could have just had main at the bottom of your source code, and not bothered prototyping at all.:rolleyes:

Quzah.