C++ Quiz

Difficulty:

According to the C++23 standard, what is the output of this program?

#include <iostream>
#include <type_traits>

int main()
{
    std::cout << std::is_signed<char>::value;
}

Hint

Plain char, signed char, and unsigned char are three distinct types.

Reveal answer

The program is unspecified / implementation defined

Explanation

Type char is a distinct type that has an implementation-defined choice of “signed char” or “unsigned char” as its underlying type.