c++ utf8与GB22312互转

c++ utf8与GB22312互转

#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;  
}