// int2byte.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include/*#define MAKEWORD(a, b) ((WORD)(((BYTE)(((DWORD_PTR)(a)) & 0xff)) | ((WORD)((BYTE)(((DWORD_PTR)(b)) & 0xff))) << 8))#define MAKELONG(a, b) ((LONG)(((WORD)(((DWORD_PTR)(a)) & 0xffff)) | ((DWORD)((WORD)(((DWORD_PTR)(b)) & 0xffff))) << 16))#define LOWORD(l) ((WORD)(((DWORD_PTR)(l)) & 0xffff))#define HIWORD(l) ((WORD)((((DWORD_PTR)(l)) >> 16) & 0xffff))#define LOBYTE(w) ((BYTE)(((DWORD_PTR)(w)) & 0xff))#define HIBYTE(w) ((BYTE)((((DWORD_PTR)(w)) >> 8) & 0xff))*/// ==========================================================// Big Endian / Small Endian utility functions// ==========================================================BOOL IsSmallEndian(){ DWORD wd = 0x22; if( *((BYTE *)&wd) == 0x22 ) // Small Endian return TRUE; else return FALSE;}void SwapShort(WORD *sp) { BYTE *cp = (BYTE *)sp, t = cp[0]; cp[0] = cp[1]; cp[1] = t;}void SwapLong(DWORD *lp) { BYTE *cp = (BYTE *)lp, t = cp[0]; cp[0] = cp[3]; cp[3] = t; t = cp[1]; cp[1] = cp[2]; cp[2] = t;}// int 2 byteBYTE *Int2Byte(int nVal){ BYTE *pByte = new BYTE[4]; for (int i = 0; i<4;i++) { pByte[i] = (BYTE)(nVal >> 8*(3-i) & 0xff); } return pByte;}// byte 2 intint Byte2Int(BYTE *pb){ // assume the length of pb is 4 int nValue=0; for(int i=0;i < 4; i++) { nValue += ( pb[i] & 0xFF)<<(8*(3-i)); } return nValue;}int _tmain(int argc, _TCHAR* argv[]){ //PC, 小端字节 // BYTE *byte = Int2Byte(0x12345678); printf("byte[0]=0x%xh,byte[1]=0x%xh,byte[2]=0x%xh, byte[3]=0x%xh\n", byte[0], byte[1], byte[2],byte[3]); int nVal = Byte2Int(byte); printf("nVal=0x%xh\n\n",nVal); // // 小端字节应该是得到 0xefcdab89, 大端得到0x89abcdef WORD wLow, wHigh; DWORD dwData; BYTE b[4] = {0x89, 0xab, 0xcd, 0xef}; DWORD dwVal = 0xefcdab89; // DWORD分解成BYTE数组 WORD lo = LOWORD(dwVal), hi = HIWORD(dwVal); printf("lo=0x%xh,hi=0x%xh\n", lo, hi); //BYTE数组组合成DWORD wLow = MAKEWORD(b[0],b[1]); wHigh = MAKEWORD(b[2], b[3]); dwData = MAKELONG(wLow, wHigh); printf("wLow=0x%xh,wHigh=0x%xh,dwData=0x%xh\n", wLow, wHigh, dwData); getchar(); return 0;}