C and ASM probelm

[peckitt99]

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

#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?

[manutd]

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.

[peckitt99]

what do you mean "ASM fixation"?

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

[manutd]

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

[swoopy]

>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.

[maxorator]

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

[peckitt99]

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

[Salem]

Which compiler are you using?
And which OS?

VC6 / XP for instance is NOT a valid combination.

[peckitt99]

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