string to wstring

To convert a string to a wstring in C++, you can follow these steps:

1. Include the necessary headers: To work with strings and wstrings, you need to include the <string> and <locale> headers.

2. Set the locale: Use the std::locale class to set the appropriate locale for your program. This is necessary because wstrings use wide characters that may require a specific encoding.

3. Convert the string: Use the std::wstring_convert class to convert the string to a wstring. Create an instance of std::wstring_convert and call its from_bytes function, passing the string as the argument. This function converts the string to a wstring using the current locale.

4. Get the converted wstring: Store the converted wstring in a variable of type std::wstring.

Here is an example of code that demonstrates these steps:

#include <string>
#include <locale>

int main() {
    std::string str = "Hello, world!"; // Example string

    std::locale loc(""); // Set the default locale

    std::wstring_convert<std::codecvt_utf8<wchar_t>> converter; // Create a converter
    std::wstring wstr = converter.from_bytes(str); // Convert the string to a wstring

    // Use the converted wstring as needed
    // ...

    return 0;
}

Note: The above code assumes that the string is encoded in UTF-8. If your string is encoded in a different format, you may need to use a different codecvt specialization in the std::wstring_convert template.