#include extern int printf(char *fmt, ...); void kmain(void) { con_init(); printf("Kernel booting...\n"); printf("Kernel booted!\n"); printf("Number: %s %04x\n", "test", 0x18C); printf("Number: %s %04X\n", "test", 0x18C); printf("Number: %s %#04x\n", "test", 0x18C); printf("Number: %s %#04X\n", "test", 0x18C); }