how do you get arrow key input in DOS??

i am just wondering how to get input from the arrow keys

ok i made a program that creates a window in dos please help me figure out what is wrong it compiles but when i execute and after i enter my numbers it says that it encounter problems and had to close

Code:

---

#include "stdafx.h"

int createwindow(int x,int y);

struct window{
                int x,y;
               
        }test;

int main(int argc, char* argv[])
{

        printf("enter the x dimension\n");
        scanf("%d",&test.x);
        printf("\nenter the y dimension\n");
        scanf("%d");
        createwindow(test.x,test.y);
                                       
        return 0;
}

int createwindow(int x,int y){
        int help1,help2,help3;
        for(help1=0;help1==x;help1++){
                printf("-");
                for(help2=0;help2==y;help2++){
                        printf("|");
                                for(help3=0;help3==(x-2);help3++){
                                        printf(" ");
                                        printf("|");
                                }
                }
        }
        return 0;
}

---

i optimized my program but this doesnt work either please smeone tell me what is wrong?

Code:

---

#include "stdafx.h"

int createwindow(int x,int y);

struct window{
                int x,y;
               
        };

int main(int argc, char* argv[])
{
        window test;
        printf("enter the x dimension\n");
        scanf("%d",&test.x);
        printf("\nenter the y dimension\n");
        scanf("%d");
        createwindow(test.x,test.y);
                                       
        return 0;
}

int createwindow(int x,int y){
        int help,help1;
        for(help=0;help1==x;help++){
                printf("-");
        }
        for(help=0;help==y;help++){
                printf("|");
                for(help1=0;help1==(x-2);help1++){
                        printf(" ");
                }
        }
        for(help=0;help==x;help++){
                printf("-");
        }
        return 0;
}

---

ok sorry guys for wasting your time i found the problem but now i have another problem when i enter the numbers it says press enter to contnue i will show my new code

Code:

---

#include "stdafx.h"

int createwindow(int x,int y);

struct window{
                int x,y;
               
        };

int main(int argc, char* argv[])
{
        window test;
        printf("enter the x dimension\n");
        scanf("%d",&test.x);
        printf("\nenter the y dimension\n");
        scanf("%d",&test.y);
        createwindow(test.x,test.y);
                                       
        return 0;
}

int createwindow(int x,int y){
        int help,help1;
        for(help=0;help1==x;help++){
                printf("-");
        }
        for(help=0;help==y;help++){
                printf("|");
                for(help1=0;help1==(x-2);help1++){
                        printf(" ");
                }
        }
        for(help=0;help==x;help++){
                printf("-");
        }
        return 0;
}

---

>>i am just wondering how to get input from the arrow keys
http://faq.cprogramming.com/cgi-bin/...&id=1043284392

>>for(help=0;help1==x;help++)
and
>>for(help=0;help==y;help++)
and
>>for(help1=0;help1==(x-2);help1++)
and
>>for(help=0;help==x;help++)
The test condition is wrong. I'd guess you'd want something more like:
>>for(help=0;help < x;help++)
... or maybe something similar? ;)

Write an interrupt 09h interrupt handler.


For C++ use (...) and for C use (void) in interrupt <somefunc>().

Code:

---


#define DOWN 1
#define UP      0
#define FALSE  0
#define TRUE    1



typedef unsigned char BYTE;

BYTE keys[128];

int HandlerInstalled;

interrupt *OldHandler=0;

void StartKeyboard(void);
void EndKeyboard(void);


interrupt NewKeyHandler(...)
{
  BYTE ch=inportb(0x60);
  if (ch<128)
  {
      keys[ch]=DOWN
      lastkey=ch
  }
  else
  {
    if (ch==170)
    {
      keys[lastkey]=UP;
      lastkey=ch;
    }
    else
    {
      keys[ch-128]=UP;
      lastkey=ch-128;
    }
  }
 
  //Acknowledge EOI
  outportb(0x20,0x20);

}
 
void StartKeyboard(void)
{

  //register our exit function
  //This will not catch CTRL-C or int 23h
  //But with handler installed - CTRL-C will do nothing
  //Upon normal termination of code - EndKeyboard will always be
  //called
  atexit(EndKeyboard);

  //Save old handler
  OldHandler=getvect(0x09);

  //Install new one
  setvect(0x09,NewKeyHandler);

  HandlerInstalled=TRUE;
}

void EndKeyboard(void)
{
  if (HandlerInstalled)
  {
    setvect(0x09,OldHandler);
    HandlerInstalled=FALSE;
  }
}

---

Then to test whether or not a key is down:

if (keys[key_scan_code] dosomething();