关于C++解析utf-8字符流的转换

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部分摘自：http://topic.csdn.net/u/20101013/21/372669f3-323e-42bb-ae2d-776d46aae45b.html

@ Loaden

如果你本地程序是UNICODE编码的话，你需要先转换到ANSI，再从ANSI转换到UNICODE。

C/C++ code

#include <windows.h>#include <iostream>#include <vector>using namespace std;std::wstring UT2WC(const char* buf){    int len = MultiByteToWideChar(CP_UTF8, 0, buf, -1, NULL, 0);    std::vector<wchar_t> unicode(len);    MultiByteToWideChar(CP_UTF8, 0, buf, -1, &unicode[0], len);    return std::wstring(&unicode[0]);}std::string WC2UT(const wchar_t* buf){    int len = WideCharToMultiByte(CP_UTF8, 0, buf, -1, NULL, 0, NULL, NULL);    std::vector<char> utf8(len);    WideCharToMultiByte(CP_UTF8, 0, buf, -1, &utf8[0], len, NULL, NULL);    return std::string(&utf8[0]);}std::wstring MB2WC(const char* buf){    int len = MultiByteToWideChar(CP_ACP, 0, buf, -1, NULL, 0);    std::vector<wchar_t> unicode(len);    MultiByteToWideChar(CP_ACP, 0, buf, -1, &unicode[0], len);    return std::wstring(&unicode[0]);}std::string WC2MB(const wchar_t* buf){    int len = WideCharToMultiByte(CP_ACP, 0, buf, -1, NULL, 0, NULL, NULL);    std::vector<char> utf8(len);    WideCharToMultiByte(CP_ACP, 0, buf, -1, &utf8[0], len, NULL, NULL);    return std::string(&utf8[0]);}int main(){    setlocale(LC_ALL, "");    const wchar_t* s1 = L"UNICODE转换成UTF-8";    cout << WC2UT(s1).c_str() << endl;    const char* s2 = "ANSI转换成UNICODE";    wcout << MB2WC(s2).c_str() << endl;    const wchar_t* s3 = L"UNICODE转换成ANSI";    cout << WC2MB(s3).c_str() << endl;    return 0;}