说明：  这是一个非常实用的文档，帮助c和c++语言学习爱好开发者记忆的文档，里面包含了c和c++的绝大部分函数语句，里面各个函数语句的讲解也非常的到位，希望它可以帮助更多的爱好开发者
(This is a very useful document to help c and c++ language learning hobby developers memory document, which contains a c and c++, most of the function statement inside the function statement to explain the very place, I hope it can help more more loving developers)