UNIX网络编程第3章套接字编程简介3.2套接字地址结构3.3值结果参数3.4字节排序函数

 1:  #include <iostream>

 2:  #include "../lib/unpsunyj.h"

 3:  

 4:  int main(int argc, char **argv)

 5:  {

 6:      union {

 7:          short s;

 8:          char  c[sizeof(short)];

 9:      } un;

10:   

11:      un.s = 0x0103;

12:      std::cout << "un.s =: " << un.s << std::endl;

13:      printf("%s: ", CPU_VENDOR_OS);

14:      if (sizeof(short) == 2)

15:      {

16:          if (un.c[0] == 1 && un.c[1] == 3)

17:              printf("big-endian
");

18:          else if (un.c[0] == 3 && un.c[1] == 1)

19:              printf("little-endian
");

20:          else

21:              printf("unknown
");

22:      }

23:      else

24:          printf("sizeof(short) = %d
", static_cast<int>(sizeof(short)));

25:   

26:      return 0;

27:  }

28: