怎么编译不通过？

我怎么在linux下用命令gcc bison.c老是出错呢？
#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;
}

返回的好像是头文件有问题。但是头文件怎么会有问题呢？