双字节字符与单字节字符转换

 1 std::string wstring2string(const std::wstring& wstr)
 2 {
 3     int bufLen = WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,NULL,0,NULL,NULL);
 4     char* strbuf = new char[bufLen];
 5     WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,strbuf,bufLen,NULL,NULL);
 6     std::string temp(strbuf);
 7     delete[] strbuf;
 8 
 9     return temp;
10 }
11 
12 std::wstring string2wstring(const std::string& str)
13 {
14     int bufLen = MultiByteToWideChar(CP_UTF8,0,str.c_str(),-1,NULL,0);
15     wchar_t* wstrbuf = new wchar_t[bufLen];
16     MultiByteToWideChar(CP_UTF8,0,str.c_str(),-1,wstrbuf,bufLen);
17     std::wstring temp(wstrbuf);
18     delete[] wstrbuf;
19 
20     return temp;
21 }

注意这里使用的是CP_UTF8 而不是 CP_ACP