Going Global

Test your C++ programming skills by solving the given puzzle about global variables.

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Puzzle code

Carefully read the code given below:

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#include <iostream>
int id;
int main()
{
    std::cout << id;
}

Your task: Guess the output

Try to guess the output of the above code. Attempt the following quiz to assess your understanding.

Q

What is the expected output of the above code?

A)

0

B)

-1

C)

Undefined behavior

D)

Compilation error

Let’s discuss this code and output together in the next lesson.

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