#include<unistd.h>#include<sys/types.h>#include<sys/stat.h>#include<fcntl.h>#include<stdio.h>int main(){  int fd,size;  char s []="Linux Programmer!\n",buffer[80];  fd=open("/root/Documents/kkkkk/leijiangtao/myfile",O_WRONLY|O_CREAT);  write(fd,s,sizeof(s));  close(fd);  fd=open("/root/Documents/kkkkk/leijiangtao/myfile",O_RDONLY);  size=read(fd,buffer,sizeof(buffer));  printf("%s",buffer);  close(fd);  return 0;}//"/root/Documents/leijiangtao/myfile"这句一定要写完整尤其是root前面的那个///myfile后面加不加后缀无所谓//再就是要注意汉子的符号/*[root@linux 已利用]# gcc open.c[root@linux 已利用]# ./a.outLinux Programmer![root@linux 已利用]# */