让小学生很轻易地背单词，能让他们可以不用老师也能很好的学英语-Let students easily back words, they can not allow teachers to learn English well

实现小学生多边形面积和周长问题的自动出题，自动校验答案，打分存入文件等简单功能，使用了简单的C++指针，继承与派生，多态，文件流等，是一道综合性很强的题目-Using the simple C++ pointer, inheritance and derived, polymorphism, file flow, is a comprehensive strong Of the title