wchar_t *和char * 相互轉化

轉載了一個簡單粗暴的方法：

std::wstring CharToWchar(const char* c, size_t m_encode = CP_ACP)
{
	std::wstring str;
	int len = MultiByteToWideChar(m_encode, 0, c, strlen(c), NULL, 0);
	wchar_t*	m_wchar = new wchar_t[len + 1];
	MultiByteToWideChar(m_encode, 0, c, strlen(c), m_wchar, len);
	m_wchar[len] = '\0';
	str = m_wchar;
	delete m_wchar;
	return str;
}

std::string WcharToChar(const wchar_t* wp, size_t m_encode = CP_ACP)
{
	std::string str;
	int len = WideCharToMultiByte(m_encode, 0, wp, wcslen(wp), NULL, 0, NULL, NULL);
	char	*m_char = new char[len + 1];
	WideCharToMultiByte(m_encode, 0, wp, wcslen(wp), m_char, len, NULL, NULL);
	m_char[len] = '\0';
	str = m_char;
	delete m_char;
	return str;
}