结构数据的读写是指从\"流\"文件中读取数据存入结构，或将结构数据写入\"流\"文件。我们可以用以下两种方法进行结构数据的文件读写-read and write data structure is defined as "the flow" paper read data are stored in the structure or structures to write data "flow" document. We can use the following two methods for the structure of documents to read and write data