User Input Starts from Right To Left (Closer to Solution)

[pregunton1]

This question is actually a follow up on how to get the user input start from right to left. The idea is to simulate a Windows calculator where every time a user enters a number, this number gets moved to the left by the next one and so on. I found a code by searching through this forum that actually seems to provide that functionality but I made small modifications to accomplish my task. This is just the first draft so it needs to be modified even further but so far the idea is working when I enter numbers from 0 to 9. Now the problem is that it only works for this sequence of numbers but not for others. For example if I type the number "3", the console obviously reads "0123" instead of just "3". Or if I type a "0" and then a "1", the "0" doesn't disappear like in regular calculators. I know this is logical because this is just a draft. But can somebody give me any idea on how to fix these problems? This is driving me crazy and I need this for tomorrow! I would immensely appreciate it.

This is the code:

#include <iostream>
#include <iomanip>
#include <windows.h>
using namespace std;

struct console_t
  {
  DWORD  mode;
  HANDLE hstdin;
  HANDLE hstdout;

  console_t()
    {
    hstdin  = GetStdHandle( STD_INPUT_HANDLE  );
    hstdout = GetStdHandle( STD_OUTPUT_HANDLE );
    GetConsoleMode( hstdin, &mode );
    }

  ~console_t()
    {
    if (hstdin != INVALID_HANDLE_VALUE)
      SetConsoleMode( hstdin, mode );
    }

  bool iskeypressed( unsigned timeout_ms = 0 ) const
    {
    return WaitForSingleObject( hstdin, timeout_ms ) == WAIT_OBJECT_0;
    }

  int getkeypress() const
    {
    INPUT_RECORD inrec;
    DWORD        count;

    if (hstdin == INVALID_HANDLE_VALUE) return -1;
    SetConsoleMode( hstdin, 0 );

    do ReadConsoleInput( hstdin, &inrec, 1, &count );
    while ((inrec.EventType != KEY_EVENT) || inrec.Event.KeyEvent.bKeyDown);

    SetConsoleMode( hstdin, mode );

    return inrec.Event.KeyEvent.wVirtualKeyCode;
    }

  void gotoxy( int column, int line )
    {
    COORD coord;
    coord.X = column;
    coord.Y = line;
    SetConsoleCursorPosition( hstdout, coord );
    }

  void clearscreen()
    {
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    DWORD                      count;
    DWORD                      cellCount;
    COORD                      homeCoords = { 0, 0 };

    if (hstdout == INVALID_HANDLE_VALUE) return;

    if (!GetConsoleScreenBufferInfo( hstdout, &csbi )) return;
    cellCount = csbi.dwSize.X * csbi.dwSize.Y;

    if (!FillConsoleOutputCharacter(
      hstdout,
      (TCHAR) ' ',
      cellCount,
      homeCoords,
      &count
      )) return;

    if (!FillConsoleOutputAttribute(
      hstdout,
      csbi.wAttributes,
      cellCount,
      homeCoords,
      &count
      )) return;

    SetConsoleCursorPosition( hstdout, homeCoords );
    }
  };

int main()
  {
  console_t console;
  int key = 0;

  console.clearscreen();

  while (key != '3')
    {
    console.gotoxy( 0, 0 );
    key = console.getkeypress();
    /*Below is the part that needs to be more efficient....*/
    if(key == '0') {
        key = 0;
        cout << setw(11) << key;
    }
    else if(key == '1') {
        key = 0;
        cout << setw(10) << key;
        key = 1;
        cout << key;
    }
    else if(key == '2') {
        key = 0;
        cout << setw(9) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
    }
    else if(key == '3') {
        key = 0;
        cout << setw(8) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
        key = 3;
        cout << key;
    }
    else if(key == '4') {
        key = 0;
        cout << setw(7) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
        key = 3;
        cout << key;
        key = 4;
        cout << key;
    }
    else if(key == '5') {
        key = 0;
        cout << setw(6) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
        key = 3;
        cout << key;
        key = 4;
        cout << key;
        key = 5;
        cout << key;
    }
    else if(key == '6') {
        key = 0;
        cout << setw(5) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
        key = 3;
        cout << key;
        key = 4;
        cout << key;
        key = 5;
        cout << key;
        key = 6;
        cout << key;
    }
    else if(key == '7') {
        key = 0;
        cout << setw(4) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
        key = 3;
        cout << key;
        key = 4;
        cout << key;
        key = 5;
        cout << key;
        key = 6;
        cout << key;
        key = 7;
        cout << key;
    }
    else if(key == '8') {
        key = 0;
        cout << setw(3) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
        key = 3;
        cout << key;
        key = 4;
        cout << key;
        key = 5;
        cout << key;
        key = 6;
        cout << key;
        key = 7;
        cout << key;
        key = 8;
        cout << key;
    }
    else if(key == '9') {
        key = 0;
        cout << setw(2) << key;
        key = 1;
        cout << key;
        key = 2;
        cout << key;
        key = 3;
        cout << key;
        key = 4;
        cout << key;
        key = 5;
        cout << key;
        key = 6;
        cout << key;
        key = 7;
        cout << key;
        key = 8;
        cout << key;
        key = 9;
        cout << key;
    }

    }

  return 0;
  }

[hamsterman]

Try this

int main()
  {
  console_t console;
  int key = 0;

  console.clearscreen();

  int pos = 10;

  while (key != '3')
    {
    console.gotoxy( pos, 0 );
    key = console.getkeypress();
   
    cout << (char)key;
    pos--;

    }

  return 0;
  }

Note that you'll have to deal with lines too. Also, your input isn't great. You are printing key codes, instead of characters (even though they are equal most of the time, now you only have capitals, and num pad won't work). Sadly I don't know of a good way to fix that..