实现打印出字节，可以用来查看本机是大端机还是小端机-Achieve print, can be used to check the byte is main machine or small transceiver

1.给结构体赋值,打印结果。2.打印结构体每个成员变量的地址。3.打印该结构体的长度。4.按字节打印该结构体-1. To structure body assignment, print the results. 2. Each member variables print structures of the address. 3. Print this structure of the length of the body. 4. According to print the structur