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<pre id='vimCodeElement'>
<span class="Comment">//: Take charge of the text-mode display and keyboard.</span>

<span class="Comment">// uncomment to debug console programs</span>
<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span class="CommentedCode">//? ofstream LOG(&quot;log.txt&quot;);</span>

<span class="SalientComment">//:: Display management</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
long long int Display_row = <span class="Constant">0</span><span class="Delimiter">,</span> Display_column = <span class="Constant">0</span><span class="Delimiter">;</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
SWITCH_TO_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;switch-to-display&quot;</span>] = SWITCH_TO_DISPLAY<span class="Delimiter">;</span>
<span class="CommentedCode">//? cerr &lt;&lt; &quot;switch-to-display: &quot; &lt;&lt; SWITCH_TO_DISPLAY &lt;&lt; '\n'; //? 1</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case SWITCH_TO_DISPLAY: <span class="Delimiter">{</span>
  tb_init<span class="Delimiter">();</span>
  Display_row = Display_column = <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
RETURN_TO_CONSOLE<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;return-to-console&quot;</span>] = RETURN_TO_CONSOLE<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case RETURN_TO_CONSOLE: <span class="Delimiter">{</span>
  tb_shutdown<span class="Delimiter">();</span>
<span class="CommentedCode">//?   Trace_stream-&gt;dump_layer = &quot;all&quot;; //? 1</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Teardown&quot;)</span>
tb_shutdown<span class="Delimiter">();</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
CLEAR_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;clear-display&quot;</span>] = CLEAR_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case CLEAR_DISPLAY: <span class="Delimiter">{</span>
  tb_clear<span class="Delimiter">();</span>
  Display_row = Display_column = <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
CLEAR_LINE_ON_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;clear-line-on-display&quot;</span>] = CLEAR_LINE_ON_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case CLEAR_LINE_ON_DISPLAY: <span class="Delimiter">{</span>
  long long int width = tb_width<span class="Delimiter">();</span>
  for <span class="Delimiter">(</span>long long int x = Display_column<span class="Delimiter">;</span> x &lt; width<span class="Delimiter">;</span> ++x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    tb_change_cell<span class="Delimiter">(</span>x<span class="Delimiter">,</span> Display_row<span class="Delimiter">,</span> <span class="Constant">' '</span><span class="Delimiter">,</span> TB_WHITE<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
  tb_present<span class="Delimiter">();</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
PRINT_CHARACTER_TO_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;print-character-to-display&quot;</span>] = PRINT_CHARACTER_TO_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case PRINT_CHARACTER_TO_DISPLAY: <span class="Delimiter">{</span>
  int h=tb_height<span class="Delimiter">(),</span> w=tb_width<span class="Delimiter">();</span>
  long long int height = <span class="Delimiter">(</span>h &gt;= <span class="Constant">0</span><span class="Delimiter">)</span> ? h : <span class="Constant">0</span><span class="Delimiter">;</span>
  long long int width = <span class="Delimiter">(</span>w &gt;= <span class="Constant">0</span><span class="Delimiter">)</span> ? w : <span class="Constant">0</span><span class="Delimiter">;</span>
  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
  long long int c = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span class="CommentedCode">//?   tb_shutdown(); //? 1</span>
<span class="CommentedCode">//?   cerr &lt;&lt; &quot;AAA &quot; &lt;&lt; c &lt;&lt; ' ' &lt;&lt; (int)'\n' &lt;&lt; ' ' &lt;&lt; (int)'\r' &lt;&lt; '\n'; //? 1</span>
<span class="CommentedCode">//?   exit(1); //? 1</span>
  if <span class="Delimiter">(</span>c == <span class="cSpecial">'\n'</span> || c == <span class="cSpecial">'\r'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>Display_row &lt; height-<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      Display_column = <span class="Constant">0</span><span class="Delimiter">;</span>
      ++Display_row<span class="Delimiter">;</span>
      tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
      tb_present<span class="Delimiter">();</span>
    <span class="Delimiter">}</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>c == <span class="cSpecial">'\b'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>Display_column &gt; <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      tb_change_cell<span class="Delimiter">(</span>Display_column-<span class="Constant">1</span><span class="Delimiter">,</span> Display_row<span class="Delimiter">,</span> <span class="Constant">' '</span><span class="Delimiter">,</span> TB_WHITE<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
      --Display_column<span class="Delimiter">;</span>
      tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
      tb_present<span class="Delimiter">();</span>
    <span class="Delimiter">}</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  int color = TB_BLACK<span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> &gt; <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)));</span>
    color = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span class="CommentedCode">//?     tb_shutdown(); //? 1</span>
<span class="CommentedCode">//?     cerr &lt;&lt; &quot;AAA &quot; &lt;&lt; color &lt;&lt; '\n'; //? 1</span>
<span class="CommentedCode">//?     exit(1); //? 1</span>
  <span class="Delimiter">}</span>
  tb_change_cell<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">,</span> c<span class="Delimiter">,</span> color<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
  if <span class="Delimiter">(</span>Display_column &lt; width-<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    ++Display_column<span class="Delimiter">;</span>
    tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  tb_present<span class="Delimiter">();</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
CURSOR_POSITION_ON_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;cursor-position-on-display&quot;</span>] = CURSOR_POSITION_ON_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case CURSOR_POSITION_ON_DISPLAY: <span class="Delimiter">{</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>Display_row<span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>Display_column<span class="Delimiter">);</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
MOVE_CURSOR_ON_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;move-cursor-on-display&quot;</span>] = MOVE_CURSOR_ON_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case MOVE_CURSOR_ON_DISPLAY: <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
  Display_row = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)));</span>
  Display_column = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
  tb_present<span class="Delimiter">();</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
MOVE_CURSOR_DOWN_ON_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;move-cursor-down-on-display&quot;</span>] = MOVE_CURSOR_DOWN_ON_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case MOVE_CURSOR_DOWN_ON_DISPLAY: <span class="Delimiter">{</span>
  int h=tb_height<span class="Delimiter">();</span>
  long long int height = <span class="Delimiter">(</span>h &gt;= <span class="Constant">0</span><span class="Delimiter">)</span> ? h : <span class="Constant">0</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>Display_row &lt; height-<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Display_row++<span class="Delimiter">;</span>
    tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
    tb_present<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
MOVE_CURSOR_UP_ON_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;move-cursor-up-on-display&quot;</span>] = MOVE_CURSOR_UP_ON_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case MOVE_CURSOR_UP_ON_DISPLAY: <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>Display_row &gt; <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Display_row--<span class="Delimiter">;</span>
    tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
    tb_present<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
MOVE_CURSOR_RIGHT_ON_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;move-cursor-right-on-display&quot;</span>] = MOVE_CURSOR_RIGHT_ON_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case MOVE_CURSOR_RIGHT_ON_DISPLAY: <span class="Delimiter">{</span>
  int w=tb_width<span class="Delimiter">();</span>
  long long int width = <span class="Delimiter">(</span>w &gt;= <span class="Constant">0</span><span class="Delimiter">)</span> ? w : <span class="Constant">0</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>Display_column &lt; width-<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Display_column++<span class="Delimiter">;</span>
    tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
    tb_present<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
MOVE_CURSOR_LEFT_ON_DISPLAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;move-cursor-left-on-display&quot;</span>] = MOVE_CURSOR_LEFT_ON_DISPLAY<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case MOVE_CURSOR_LEFT_ON_DISPLAY: <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>Display_column &gt; <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Display_column--<span class="Delimiter">;</span>
    tb_set_cursor<span class="Delimiter">(</span>Display_column<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
    tb_present<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
DISPLAY_WIDTH<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;display-width&quot;</span>] = DISPLAY_WIDTH<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case DISPLAY_WIDTH: <span class="Delimiter">{</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>tb_width<span class="Delimiter">());</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
DISPLAY_HEIGHT<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;display-height&quot;</span>] = DISPLAY_HEIGHT<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case DISPLAY_HEIGHT: <span class="Delimiter">{</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>tb_height<span class="Delimiter">());</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="SalientComment">//:: Keyboard management</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
WAIT_FOR_KEY_FROM_KEYBOARD<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;wait-for-key-from-keyboard&quot;</span>] = WAIT_FOR_KEY_FROM_KEYBOARD<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case WAIT_FOR_KEY_FROM_KEYBOARD: <span class="Delimiter">{</span>
  tb_event event<span class="Delimiter">;</span>
  do <span class="Delimiter">{</span>
    tb_poll_event<span class="Delimiter">(</span>&amp;event<span class="Delimiter">);</span>
  <span class="Delimiter">}</span> while <span class="Delimiter">(</span>event<span class="Delimiter">.</span>type != TB_EVENT_KEY<span class="Delimiter">);</span>
  long long int result = event<span class="Delimiter">.</span>key ? event<span class="Delimiter">.</span>key : event<span class="Delimiter">.</span>ch<span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>result == TB_KEY_CTRL_C<span class="Delimiter">)</span> tb_shutdown<span class="Delimiter">(),</span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  if <span class="Delimiter">(</span>result == TB_KEY_BACKSPACE2<span class="Delimiter">)</span> result = TB_KEY_BACKSPACE<span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>result == TB_KEY_CARRIAGE_RETURN<span class="Delimiter">)</span> result = TB_KEY_NEWLINE<span class="Delimiter">;</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
READ_KEY_FROM_KEYBOARD<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_number[<span class="Constant">&quot;read-key-from-keyboard&quot;</span>] = READ_KEY_FROM_KEYBOARD<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case READ_KEY_FROM_KEYBOARD: <span class="Delimiter">{</span>
  tb_event event<span class="Delimiter">;</span>
  int event_type = tb_peek_event<span class="Delimiter">(</span>&amp;event<span class="Delimiter">,</span> <span class="Constant">5</span><span class="Comment">/*</span><span class="Comment">ms</span><span class="Comment">*/</span><span class="Delimiter">);</span>
  long long int result = <span class="Constant">0</span><span class="Delimiter">;</span>
  long long int found = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="CommentedCode">//?   cerr &lt;&lt; event_type &lt;&lt; '\n'; //? 1</span>
  if <span class="Delimiter">(</span>event_type == TB_EVENT_KEY<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    result = event<span class="Delimiter">.</span>key ? event<span class="Delimiter">.</span>key : event<span class="Delimiter">.</span>ch<span class="Delimiter">;</span>
    if <span class="Delimiter">(</span>result == TB_KEY_CTRL_C<span class="Delimiter">)</span> tb_shutdown<span class="Delimiter">(),</span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
    if <span class="Delimiter">(</span>result == TB_KEY_BACKSPACE2<span class="Delimiter">)</span> result = TB_KEY_BACKSPACE<span class="Delimiter">;</span>
    if <span class="Delimiter">(</span>result == TB_KEY_CARRIAGE_RETURN<span class="Delimiter">)</span> result = TB_KEY_NEWLINE<span class="Delimiter">;</span>
    found = <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>found<span class="Delimiter">);</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span class="PreProc">#include</span><span class="Constant">&quot;termbox/termbox.h&quot;</span>
</pre>
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