C and ASM probelm

hi, unsure if this is the right part to post this sorry if it is.

i was wondering if anyone could figure out what the error means when i try to run it, when i compile it says there is no errors but then when i try to run the program it comes up with serveral errors.

Here is the code

Code:

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


#ifndef Q4_CPP
#define Q4_CPP

// Function defs
#define DOS_INT       int 21h
#define VIDEO_INT     int 10h
#define KEYBOARD_INT  int 16h

// Sub function defs
#define GET_DATE          2Ah
#define GET_VID_STATE     0Fh
#define SCROLL_UP         06h
#define GET_TIME          2Ch
#define CURSOR_TO         02h
#define GET_CURSOR        03h
#define SET_CURSOR_SHAPE  01h
#define CHECK_KEYBOARD    11h

#define SCREEN_HEIGHT  25
#define SCREEN_WIDTH   80
#define BLUE           1
#define BLACK          0
#define GREEN          4
#define MSG_ROWS       4
#define MSG_WIDTH      24
#define WIN_TOP        (SCREEN_HEIGHT-MSG_ROWS) / 2
#define WIN_LEFT       (SCREEN_WIDTH-MSG_WIDTH) /2
#define WIN_HEIGHT     MSG_ROWS
#define WIN_WIDTH      MSG_WIDTH

typedef unsigned char BYTE;
typedef unsigned int  WORD;

void GetSystemDate(WORD *Year, BYTE *Month, BYTE *Day);
void GetSystemTime(BYTE *Hour, BYTE *Min, BYTE *Sec);
void DrawWindow(BYTE Left,BYTE Top,BYTE Right,BYTE Bottom, BYTE Attrib);
void GotoXY(BYTE x, BYTE y);
void CursorOff();
void CursorOn();
WORD KeyPressed();

// Globals
// Hold cursor scan lines to restore later. Could have returned from
// Cursor off but prefer simple call line for this function.
BYTE ScanStart,ScanEnd;

#endif

void main()

{

  BYTE Month,Day,Hour,Min,Sec,PrevSec;

  WORD Year; 


  DrawWindow(0,0,SCREEN_WIDTH-1,SCREEN_HEIGHT-1,BLUE << 4);

  DrawWindow(WIN_LEFT,WIN_TOP,WIN_LEFT+WIN_WIDTH,WIN_TOP+WIN_HEIGHT,BLACK);

  DrawWindow(WIN_LEFT-1,WIN_TOP-1,WIN_LEFT+WIN_WIDTH-1,WIN_TOP+WIN_HEIGHT-1,GREEN <<4);

  textbackground(GREEN);

  textcolor(BLACK);

  GotoXY(WIN_LEFT+3,WIN_TOP); 


  GetSystemDate(&Year,&Month,&Day);

  cprintf("Date is %02d/%02d/%02d",Day,Month,Year); 


  GetSystemTime(&Hour,&Min,&Sec); 



  {

    GetSystemTime(&Hour,&Min,&Sec); 


    if (PrevSec != Sec)   // Only update every second to avoid flashing

    {

      GotoXY(WIN_LEFT+4,WIN_TOP+2);

      cprintf("Time is %02d:%02d:%02d",Hour,Min,Sec);

      PrevSec=Sec;

    }

  } // end while 


  // Restore defaults


  textbackground(BLACK);

  textcolor(WHITE);

  clrscr();

} 

void GetSystemTime(BYTE *Hour, BYTE *Min, BYTE *Sec)

{

asm {XOR AX,AX 
    MOV AH, GET_TIME
    DOS_INT 
    MOV BX, Hour //GET ADDRESS
    MOV BYTE ptr [BX], CH //COPY HOUR 
    MOV BX, Min
    MOV BYTE ptr [BX], CL
    MOV BX, Sec
    MOV BYTE ptr [BX], DH
    }

}

the errors is get are.

1. undefined symbol _GotoXY in module
2. undefined symbol _GetSystemDate in module
3. undefined symbol _DrawWindow in module

can anyone help and how to fix them?

1. int main
2. You declare GotoXY, etc, but never define them.
PS, do you have a ASM fixation? Assembly is painful unless you need to use. And its especially ugly in C.

what do you mean "ASM fixation"?

and does it really matter if it is int main() or void main()?

Most of the post I've looked at of your's are about inline assembly in C. And yes, it does matter.

>and does it really matter if it is int main() or void main()?
Yes it does. Read the FAQ:
What's the difference between... > main() / void main() / int main() / int main(void) / int main(int argc, char *argv[])

And there's also a gotoxy function contained in the FAQ. You might want to grab that.

Is it a DOS program? If not, you can't use interrupts.

yeah it is a DOS program, should diplay a working clock.

Which compiler are you using?
And which OS?

VC6 / XP for instance is NOT a valid combination.

the compiler is turbo C i think but unsure we got it downloaded from uni.
the OS is just windows.