通过扫描字符串及结构体数组，实现对XML文件的简单初步解析.-by scanning string and array structure and realizing the XML file simple preliminary analysis.

用数组和结构体实现保存文件，录入内容为所有同学的学号、姓名、语文成绩和数学成绩-Structure with the array and achieve the goal of preserving documents, recording the content for all students of the school number, name, language and mathematics achievement

vc实现将结构体数组保存到文件中，并能够读取出来-vc realize the structure of the array to a file, and can be read out

定义复杂结构体—包括嵌套结构体数组,并显示结构体所占字节数-Define complex structures- including nested structure arrays, and display the structure of bytes