多字节字符串与宽字节字符串的相互转化

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我们有时在程序设计中，可能需要多字节字符串和宽字节字符串之间进行相互的转化，一般来说有两种API;

一，C API： mbstowcs,wcstombs；示例程序如下：

#include <stdio.h>#include <Windows.h>//wchar转化为charchar* wcharTochar(wchar_t *src){int len=wcslen(src);char *dest = new char[len+1];ZeroMemory(dest,len+1);wcstombs( dest, src, len );return dest;}//char转化为wcharwchar_t* charTowchar(char *src){int len=strlen(src);wchar_t *dest = new wchar_t[len+1];ZeroMemory(dest,2*len+2);mbstowcs(dest,src,len);return dest;}void main(){wchar_t* wcharStr=L"hello world!";char* asciiStr=wcharTochar(wcharStr);printf("%s\n",asciiStr);delete[] asciiStr;char *charStr="welcome!";wchar_t *wcharStr2=charTowchar(charStr);printf("%S",wcharStr2);printf("\n");delete[] wcharStr2;}

二，WIN32 API :WideCharToMultiByte和MultiByteToWideChar ；示例代码如下

1，宽字节转化为多字节

wchar_t* wcs = L"中国，你好！I Love You!";int lengthOfMbs = WideCharToMultiByte( CP_ACP, 0, wcs, -1, NULL, 0, NULL, NULL);char* mbs = new char[ lengthOfMbs ];WideCharToMultiByte( CP_ACP, 0, wcs, -1, mbs, lengthOfMbs, NULL, NULL); printf("%s\n",mbs);delete[] mbs;

2，多字节转化为宽字节

char* mbs = "I Love You!";int lengthOfWcs = MultiByteToWideChar( CP_ACP, 0, mbs, -1, NULL, 0 );wchar_t* wcs = new wchar_t[lengthOfWcs];MultiByteToWideChar( CP_ACP, 0, mbs, -1, wcs, lengthOfWcs );delete[] wcs;

参考：http://blog.csdn.net/waterathena/article/details/3767588