C++ wchar_t

// Wide character literal
wchar_t wide_char = L'A';

// Wide character using a Universal Character Name (UCN)
wchar_t wide_omega = L'\u03A9'; 

// Wide string literal
const wchar_t* wide_str = L"Extended String";

#include <iostream>

int main() {
    // Outputs 2 on Windows, 4 on most POSIX systems
    std::cout << sizeof(wchar_t) << '\n'; 
    return 0;
}

#include <iostream>
#include <limits>
#include <cstdint>

int main() {
    std::cout << "Is signed: " << std::numeric_limits<wchar_t>::is_signed << '\n';
    
    // Explicit cast to std::uintmax_t ensures compatibility with C++20 
    // and correctly prints the numeric value rather than the character.
    std::cout << "Max val: " 
              << static_cast<std::uintmax_t>(std::numeric_limits<wchar_t>::max()) 
              << '\n';
              
    return 0;
}

#include <iostream>
#include <string>

int main() {
    std::wstring greeting = L"System initialized.";
    
    // Must use std::wcout for wchar_t streams
    std::wcout << greeting << L" Length: " << greeting.length() << L'\n';
    
    return 0;
}