用数组实现的FIFO，结构体封装。用一组函数，主要参数为结构体指针，实现了类似于C++中类的操作。可用于在ARM等嵌入式处理器中作为缓冲区使用。-Using array implementation FIFO, structure package. With a set of functions, the main parameters for the structure pointer, to achieve a similar C++ in class action. Can be used