考虑到图书信息和读者信息中都包含有不同类型的数据，故分别建立图书和读者两种类型的结构体；由于图书和读者的数量非固定，所以采用动态链式存储来实现。-Taking into account the information in the book information and readers are different types of data included, so the books and readers were established two types of structures　books and readers as the number of non-fixed, so the dynamic chain store to achieve.