getch.gml

开放源码的编译器open watcom 1.6.0版的源代码

.func getch
#include <conio.h>
int getch( void );
.ixfunc2 '&KbIo' '&func'
.funcend
.desc begin
The &func function obtains the next available keystroke from the console.
Nothing is echoed on the screen (the function
.kw getche
will echo the keystroke, if possible).
When no keystroke is available, the function waits until a key is
depressed.
.pp
The
.kw kbhit
function can be used to determine if a keystroke is available.
.desc end
.return begin
A value of
.mono EOF
is returned when an error is detected; otherwise
the &func function returns the value of the keystroke (or character).
.pp
When the keystroke represents an extended function key (for example,
a function key, a cursor-movement key or the ALT key with a letter or
a digit),
.if '&machsys' eq 'QNX' .do begin
0xff
.do end
.el .do begin
zero
.do end
is returned and the next call to &func returns a value for the
extended function.
.return end
.see begin
.im seeiocon getch
.see end
.exmp begin
#include <stdio.h>
#include <conio.h>

void main()
  {
    int c;
.exmp break
    printf( "Press any key\n" );
    c = getch();
    printf( "You pressed %c(%d)\n", c, c );
  }
.exmp end
.class WATCOM
.system