|
Turbo C 2.0、Borland C++库函数及用例(7) result &= 0x02;
(result) ? (printf("Drive A: Ready\n")) :
(printf("Drive A: Not Ready\n")); return 0;
}
函数名: bioskey
功 能: 直接使用BIOS服务的键盘接口
用 法: int bioskey(int cmd);
程序例:#include <stdio.h>
#include <bios.h>
#include <ctype.h>#define RIGHT 0x01
#define LEFT 0x02
#define CTRL 0x04
#define ALT 0x08int 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;
}
函数名: biosmemory
功 能: 返回存储块大小
用 法:int biosmemory(void);
程序例:
#include <stdio.h>
#include <bios.h>
int main(void)
{
int memory_size;
memory_size = biosmemory();
/* returns value up to 640K */
printf("RAM size = %dK\n",memory_size);
return 0;
}
函数名: biosprint
功 能: 直接使用BIOS服务的打印机I/O
用 法: int biosprint(int cmd, int byte, int port);
程序例:
#include <stdio.h>
#include <conio.h>
#include <bios.h>int main(void)
{
#define STATUS 2 /* printer status command */
#define PORTNUM 0 /* port number for LPT1 */ int status, abyte=0; printf("Please turn off your printer.\
Press any key to continue\n");
getch();
status = biosprint(STATUS, abyte, PORTNUM);
if (status & 0x01)
printf("Device time out.\n");
if (status & 0x08)
printf("I/O error.\n"); if (status & 0x10)
printf("Selected.\n");
if (status & 0x20)
printf("Out of paper.\n"); if (status & 0x40)
|
