#include
#include
#include
int main(){ int fd = 0; fd = creat("r", 0644); write(fd,"AAA",3); printf("333333333333\n"); char buf[5]; printf("DFSAsfd\n"); fd = open("r",O_RDONLY); read(fd,&buf,3); buf[3] = '\0'; printf("%s\n",buf);exit(0);}