string wstring 互转

#include <Windows.h>
//将string转换成wstring  
wstring string2wstring(string str)  
{  
    wstring result;  
    //获取缓冲区大小，并申请空间，缓冲区大小按字符计算  
    int len = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), NULL, 0);  
    TCHAR* buffer = new TCHAR[len + 1];  
    //多字节编码转换成宽字节编码  
    MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), buffer, len);  
    buffer[len] = '\0';             //添加字符串结尾  
    //删除缓冲区并返回值  
    result.append(buffer);  
    delete[] buffer;  
    return result;  
}  
  
//将wstring转换成string  
string wstring2string(wstring wstr)  
{  
    string result;  
    //获取缓冲区大小，并申请空间，缓冲区大小事按字节计算的  
    int len = WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), NULL, 0, NULL, NULL);  
    char* buffer = new char[len + 1];  
    //宽字节编码转换成多字节编码  
    WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), buffer, len, NULL, NULL);  
    buffer[len] = '\0';  
    //删除缓冲区并返回值  
    result.append(buffer);  
    delete[] buffer;  
    return result;  
}

标签：string,buffer,len,wstring,result,str,互转,NULL
来源： https://www.cnblogs.com/Galesaur-wcy/p/15097538.html