在linux环境下编写应用程序，该程序运行时能创建N个线程，其中既有读者线程又有写者线程，它们按照事先设计好的测试数据进行读写操作。(The application program is written in Linux environment. The program can create N threads at runtime, including reader thread and writer thread. They read and write according to pre designed test data.)