#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; }
