Simultaneous execution of both if and else blocks

Question

In C or C++

if ( x )
    statement1;
else
    statement2;

For what value of x will both statements be executed?

I know

Answer 1

In a recursive function both branches can be executed:

void recursive(bool first)
{
    if(first)
    {
        recursive(false);
    }
    else
    {
        //END
    }
}

Invoking it with

recursive(true)

will execute the if branch followed by the else branch