c/c++中string 与 wstring的相关转换

#include <cstdlib>
#include <string.h>
#include <string>
// wstring => string
std::string WString2String(const std::wstring& ws)
{
    std::string strLocale = setlocale(LC_ALL, "");
    const wchar_t* wchSrc = ws.c_str();
    size_t nDestSize = wcstombs(NULL, wchSrc, 0) + 1;
    char *chDest = new char[nDestSize];
    memset(chDest,0,nDestSize);
    wcstombs(chDest,wchSrc,nDestSize);
    std::string strResult = chDest;
    delete []chDest;
    setlocale(LC_ALL, strLocale.c_str());
    return strResult;
}
// string => wstring
std::wstring String2WString(const std::string& s)
{
    std::string strLocale = setlocale(LC_ALL, ""); 
    const char* chSrc = s.c_str();
    size_t nDestSize = mbstowcs(NULL, chSrc, 0) + 1;
    wchar_t* wchDest = new wchar_t[nDestSize];
    wmemset(wchDest, 0, nDestSize);
    mbstowcs(wchDest,chSrc,nDestSize);
    std::wstring wstrResult = wchDest;
    delete []wchDest;
    setlocale(LC_ALL, strLocale.c_str());
    return wstrResult;
}