** **int read_fd;

** **int write_fd;

** **//1打开文件，读取utf-8文件

** **read_fd=open("utf8.txt",O_RDONLY|O_CREAT);

** **write_fd=open("gbk.txt", O_WRONLY|O_CREAT);

** **char utfBuffer[256] = {0};

** **size_t inLen = read(read_fd, utfBuffer, 256);

** **ret = write(write_fd, szDest, 256-outLen);

** **close(read_fd);

** **close(write_fd);