直接使用BIOS服务的键盘接口

[c]代码库

#include <stdio.h>
#include <bios.h>
#include <ctype.h>

#define RIGHT  0x01
#define LEFT   0x02
#define CTRL   0x04
#define ALT    0x08

int main ( void )
{
	int key, modifiers;

	/* function 1 returns 0 until a key is pressed */
	while ( bioskey ( 1 ) == 0 );

	/* function 0 returns the key that is waiting */
	key = bioskey ( 0 );

	/* use function 2 to determine if shift keys were used */
	modifiers = bioskey ( 2 );
	if ( modifiers )
	{
		printf ( "[" );
		if ( modifiers & RIGHT ) printf ( "RIGHT" );
		if ( modifiers & LEFT )  printf ( "LEFT" );
		if ( modifiers & CTRL )  printf ( "CTRL" );
		if ( modifiers & ALT )   printf ( "ALT" );
		printf ( "]" );
	}
	/* print out the character read */
	if ( isalnum ( key & 0xFF ) )
		printf ( "'%c'\n", key );
	else
		printf ( "%#02x\n", key );
	return 0;
}