Assume the existence of a File class with boolean data member, isValid, indicating the file is ready for I/O. Write a unary operator, !, that accepts a constant File reference, and returns true if the file is not ready for I/O and false otherwise.

The description for the given question is described in the explanation section below.

Explanation:

In reality, the "!" operator remains overloaded throughout the library of IO-stream, which effectively comes back the contrary feature of good.

It's how that they would load the "!" operator to construct a unary member overloading feature.

Example:

class abc

{

public :

bool isValid ( )    // return true

bool operator ! ( )    // return isValid( )

};

Optionally, to overwhelm the unary, you may build a global feature "!" user.

try this:

go tos official website.

click on your profile pic at the top right of the screen and click 'edit profile'.

click on "preferences" and press "year of birth".

and then just maybe try to reset whatever error made before by typing in the correct age details again. hope this !