1 #include 
      
        2 #include 
       
         3 #include 
        
          4 int main(void) { 5     int data_processed; //用于记录已经处理的数据 6     int file_pipes[2];  //定义两个文件描述符 7     char buffer[BUFSIZ + 1];        //定义一个缓冲区，以便从管道中读取数据 8     const char * some_data = "123"; //定义一个将要写入管道中的字符串 9     memset(buffer, '\0', sizeof(buffer)); //初始化读取缓冲区10     if (pipe(file_pipes) == 0) {          //创建管道11         data_processed = write(file_pipes[1], some_data, sizeof(some_data));12         printf("写入%d个字符\n", data_processed);13         data_processed = read(file_pipes[0], buffer, BUFSIZ);14         printf("读出%d个字符。内容是：%s\n",data_processed,buffer);15         exit(EXIT_SUCCESS);16     }17     return EXIT_FAILURE;18 }