c++ wchar_t 与char 直接的转换【转】

#include "stdafx.h"
#include <iostream>
#include <sstream>

using namespace std;

char* wchar2char(wchar_t *WStr)
{
size_t len = wcslen(WStr) + 1;
size_t converted = 0;
char *CStr;
CStr=(char*)malloc(len*sizeof(char));
wcstombs_s(&converted, CStr, len, WStr, _TRUNCATE);
return CStr;
}

wchar_t *char2wchar(char *CStr)
{
size_t len = strlen(CStr) + 1;
size_t converted = 0;
wchar_t *WStr;
WStr=(wchar_t*)malloc(len*sizeof(wchar_t));
mbstowcs_s(&converted, WStr, len, CStr, _TRUNCATE);
return WStr;
}

wstring char2wchar2(char *name)
{
wstringstream wname;
wname<<name;
return wname.str().c_str();
}

int _tmain(int argc, _TCHAR* argv[])
{

char name[]="zhangsan中国";
wstring c2w2name = char2wchar2(name);
wcout<<c2w2name.c_str()<<" wstring"<<endl;

wchar_t *c2wname = char2wchar(name);
wcout<<c2wname<<" c2w"<<endl;

char *w2cname = wchar2char(c2wname);

cout<<w2cname<<" w2c"<<endl;
free (w2cname);
free(c2wname);
return 0;
}