GBK到UTF8编码转换C++实现

#include <iostream>#include <string>#include <fstream>#include <windows.h> using namespace std;string GBKToUTF8(const std::string& strGBK){string strOutUTF8 = "";WCHAR * str1;int n = MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, NULL, 0);str1 = new WCHAR[n];MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, str1, n);n = WideCharToMultiByte(CP_UTF8, 0, str1, -1, NULL, 0, NULL, NULL);char * str2 = new char[n];WideCharToMultiByte(CP_UTF8, 0, str1, -1, str2, n, NULL, NULL);strOutUTF8 = str2;delete[]str1;str1 = NULL;delete[]str2;str2 = NULL;return strOutUTF8;}string UTF8ToGBK(const std::string& strUTF8){int len = MultiByteToWideChar(CP_UTF8, 0, strUTF8.c_str(), -1, NULL, 0);unsigned short * wszGBK = new unsigned short[len + 1];memset(wszGBK, 0, len * 2 + 2);MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strUTF8.c_str(), -1, wszGBK, len);len = WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, NULL, 0, NULL, NULL);char *szGBK = new char[len + 1];memset(szGBK, 0, len + 1);WideCharToMultiByte(CP_ACP,0, wszGBK, -1, szGBK, len, NULL, NULL);//strUTF8 = szGBK;std::string strTemp(szGBK);delete[]szGBK;delete[]wszGBK;return strTemp;}int _tmain(int argc, _TCHAR* argv[]){string test("我们中国是个强大的名族，强大的动力来自每个人的支持");fstream output("test.txt",ios_base::out | ios_base::app);output << GBKToUTF8(test);//system("iconv -f GBK -t utf-8");return 0;}