What happens if you do not define a destructor in the class declaration? Nothing

Question

What happens if you do not define a destructor in the class declaration?

Nothing, a destructor is not always needed

You get an error message when you attempt to compile your program

One is created for you that does absolutely nothing

One is created for you that deallocated pointers as necessary, but otherwise it would do nothing

Nothing, a destructor is not always needed

You get an error message when you attempt to compile your program

One is created for you that does absolutely nothing

One is created for you that deallocated pointers as necessary, but otherwise it would do nothing

Explanation / Answer

ans : d:)One is created for you that deallocated pointers as necessary, but otherwise it would do nothing

A destructor function is called automatically when the object goes out of scope:
(1) the program ends
(2) the function ends
(3) a delete operator is called  
(4) a block containing local variables ends

If we do not write our own destructor in class, compiler creates a default destructor for us.
Unless we have dynamically allocated memory or pointer in class,the default destructor works fine  
When a class contains a pointer to memory allocated in class, we should write a destructor to release memory before the class instance is destroyed.
Destructor should be written in class to avoid memory leak.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.