Question

One of the valid C++ class declaration is:

• A. Class B {}
• B. class B { int x; };
• C. Public class B {}
• D. Object B { int x; };

Hint:

C++ is case-sensitive. Always write class in lowercase and end the class declaration with a semicolon.

Answer 1

The Correct Option is B

Concept:
In C++, a class is declared using the lowercase keyword class. The class body is enclosed within braces and the declaration ends with a semicolon.

Step 1: General syntax of class declaration. \[ \texttt{class ClassName \{ members; \};} \]

Step 2: Check option (A).
Class with capital C is not the C++ keyword. C++ is case-sensitive. \[ (A) \text{ is incorrect} \]

Step 3: Check option (B).
class B { int x; }; uses the correct keyword, correct braces, data member, and final semicolon. \[ (B) \text{ is correct} \]

Step 4: Check other options.
Public class is Java-style syntax, not valid C++. Object is not used to declare a class in C++. \[ \therefore \text{Correct Answer is (B)} \]