Trouble with "left" and "right" keystroke

[matthewfs]

Its 5 files (2 headers and 3 .cpp)

This one is where the keystrokes are found (name: display (2).h):

#include <windows.h>
#include <cstdlib>
#include <string>
#include <stdio.h>
#include <conio.h>  /* needed for kbhit and getch */
#include <iostream>
using namespace std;

class Display
{
public:
	string *asciidone;
	int x,y;
	int min,max;
	int len;
	Display();
	void movecursor(int x, int y)
	{
		COORD coord = {x,y};
		SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
	}
	void displayascii()
	{
		system("cls");
		movecursor(x,y);
		cout << asciidone[min] << endl << flush;
		for(int j=min+1;j<max;j++)
			{
				movecursor(x,y+j);
				cout << asciidone[j] << endl << flush;
			}
		movecursor(x,y);
	}
	void displayasciimove()
	{
		if(max<=len){
			int i, j;
			system("cls");
			movecursor(x,y);
			cout << asciidone[min] << endl << flush;
			for(i=0,j=min+1;j<max;j++,i++)
				{
					y=y+1;
					movecursor(x,y);
					cout << asciidone[j] << endl << flush;
				}
			movecursor(x,y);
		}
	}
	void movecursordown()
	{ 
		y=y+1;
		if(y>=20)
		{
			y=10;
			min++;
			max++;
			displayasciimove();
		}
		else
		{
			movecursor(x,y);
		}
	}
	void movecursorup()
	{ 
		y=y-1;

		if(min == 0 && y <= 10)
			y = 10;
		else if(y<10)
		{
			min--;
			max--;
			y=10;
			displayasciimove();
			y=10;
			movecursor(x,y);
		}
		else
		{
			movecursor(x,y);
		}
	}
	struct kbBtn
	{
	   kbBtn() {}
	   kbBtn(unsigned char ch1, unsigned char ch2 = 0)
	   {
			  this->ch1 = ch1;
			  this->ch2 = ch2;

			  unsigned short uni = 256*ch1 | ch2;
			  //printf("uni = %0x\n", uni);
			  switch(uni)
			  {
			  case 0xE048:
				 strcpy(Name, "ArrDW");
				 break;
			  case 0xE04D:
				 strcpy(Name, "ArrRI");
				 break;
			  case 0xE050:
				 strcpy(Name, "ArrUP");
				 break;
			  case 0xE04B:
				 strcpy(Name, "ArrLF");
				 break;
			  case 0xE053:
				 strcpy(Name, "DEL");
				 break;
			  case 0xE049:
				 strcpy(Name, "PgUP");
				 break;
			  case 0xE051:
				 strcpy(Name, "PgDN");
				 break;
			  case 0xE04F:
				 strcpy(Name, "END");
				 break;
			  case 0xE047:
				 strcpy(Name, "HOME");
				 break;
			  case 0x0800:
				 strcpy(Name, "BckSp");
				 break;
			  case 0x1A00:
				 strcpy(Name, "CtrlZ");
				 break;
			  default:
				 strcpy(Name, "ALFNUM");
				 break;
			  }
		   }
		   char ch1, ch2;
		   char Name[10];
	};
	int start()
	{
		int  ch1, ch2;
		kbBtn  btn;
    
		ch1 = -1;
		while (ch1 != 0x1B)              /* watch for an ESC */
			{
				if (kbhit())                /* check for a keystroke */
				{
					ch1 = getch();           /* get the key */
					if (ch1 == 0 || ch1 == 0xE0)            /* if it's 0... */
					{
					   ch2 = getch();       /* get the next key */
					   btn = getStrike(ch1, ch2);
					}
				}
				Sleep(200);
			}
		return 0;
	}
	kbBtn getStrike(unsigned char ch1, unsigned char ch2)
	{
	   kbBtn btn(ch1,ch2);
	   if(strcmp(btn.Name,"ArrDW"))
		   movecursordown();
	   else if(strcmp(btn.Name,"ArrUP"))
		   movecursorup();
	   else if(strcmp(btn.Name,"ArrRI"))
	   {
		   x = x+1;
		   movecursor(x,y);
	   }
	   return btn;
	}
};

Heres the cpp for that header (name: display.cpp):

#include <iostream>
#include<windows.h>
#include <stdio.h>
#include "display (2).h"
using namespace std;

Display::Display()
{
	  x = 5;
	  y = 10;
	  movecursor(x,y);
}

Heres the derived class (name: document.h):

#include <iostream>
#include "display (2).h"
using namespace std;

class Document : public Display
{
	
public:
	Document();
	~Document();
	int getRow(int nr);
};

And its cpp (name: document.cpp):

#include <iostream>
#include <string>
#include <windows.h>
#include <stdio.h>
#include "document.h"
using namespace std;

#define AINDEX 10

Document::Document()
{
	string *ascii;
	int start = 48;
	int i;
	int incre=AINDEX;
	int doit = 1;
	int startfrom=0;

	ascii = new string[AINDEX];
	asciidone = new string[AINDEX];

	min = 0;
	max = 10;
	do
	{
		for (i=startfrom;i<incre; i++)
		{
			if(start == 123)
			{
				doit = 0;
			}
			else
			{
				for(int j=0;j<50;j++)
				{
					asciidone[i] += start;
				}
				start++;
			}
		}
		for(i=0;i<incre;i++)
		{
			ascii[i] = asciidone[i];
		}
		incre += AINDEX;
		delete[] asciidone;
		asciidone = new string[incre];
		for(i=0;i<incre-10;i++)
		{
			asciidone[i] = ascii[i];
		}
		delete[] ascii;
		ascii = new string[incre];
		startfrom = incre - 10;
	} while (doit);

	len = start - 48;

	displayascii();
	delete[] ascii;
}

Document::~Document()
{
	delete[] asciidone;
}

the main:

#include <iostream>
#include <string>
#include "document.h"
using namespace std;

#define AINDEX 10

int main() {
	Document d;
	d.start();
}

Anyone can figure out how to implement the left and right buttons to work??

[ne555]

Just left, right? the other ones work?
I cannot test your program, however

while (ch1 != 0x1B)              /* watch for an ESC */
	{
		if (kbhit())                /* check for a keystroke */
		{
			ch1 = getch();           /* get the key */
			if (ch1 == 0 || ch1 == 0xE0)            /* if it's 0... */
			{
			   ch2 = getch();       /* get the next key */
			   btn = getStrike(ch1, ch2);
			}
		}
		Sleep(200); //IIRC: you need to hit the key between the pauses (quite hard)
	}

[ne555]

http://msdn.microsoft.com/en-us/library/ms927178.aspx use the enums instead of the hexadecimal value.