Question

Which of the following is a valid class declaration?

(a) class A { int x; };

(b) class B { }

(c) public class A { }

(d) object A { int x; };

This question was posed to me in a national level competition.

This key question is from Classes topic in chapter Source Files, Classes and Operator Overloading in C++ of C++

Answer 1

The correct option is (a) class A { int x; };

For explanation: A class declaration terminates with semicolon and starts with class keyword. only option (a) follows these rules therefore class A { int x; }; is correct.