c++ - 如何连接字符串和 wstring？

Question

我在 C++ 中有一个 wstring 变量和一个字符串变量。我想将它们连接起来，但简单地将它们相加会产生构建错误。我怎样才能将它们结合起来？如果我需要将 wstring 变量转换为字符串，我该如何完成？

//A WCHAR array is created by obtaining the directory of a folder - This is part of my C++ project
WCHAR path[MAX_PATH + 1] = { 0 };
GetModuleFileNameW(NULL, path, MAX_PATH);
PathCchRemoveFileSpec(path, MAX_PATH);

//The resulting array is converted to a wstring
std::wstring wStr(path);

//An ordinary string is created
std::string str = "Test";

//The variables are put into this equation for concatenation - It produces a build error
std::string result = wStr + str;

Answer 1

首先将wstring 转换为string，如this :

std::string result = std::string(wStr.begin(), wStr.end()) + str;

或者如果 wStr 包含非 ASCII 字符:

std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
std::string wStrAsStr = converter.to_bytes(wStr);
std::string result = wStrAsStr + str;