example3.cpp

来自「Advanced Internet Programming Lecture 2 」· C++ 代码 · 共 43 行

#include <iostream>
using namespace std;

union swap_byte {
  void swap();
  void set_byte(unsigned short i);
  void show_word();

  unsigned short u;
  unsigned char c[2];
};

void swap_byte::swap()
{
  unsigned char t;

  t = c[0];
  c[0] = c[1];
  c[1] = t;
}

void swap_byte::show_word()
{
  cout << u;
}

void swap_byte::set_byte(unsigned short i)
{
  u = i;
}

int main()
{
  swap_byte b;

  b.set_byte(49034);
  b.swap();
  b.show_word();

  return 0;
}