What are the enumeration variables?
An enumeration consists of a set of named integer constants. A variable of the enumeration type stores one of the values of the enumeration set defined by that type. Variables of enum type can be used in indexing expressions and as operands of all arithmetic and relational operators.
What is an enumeration constant?
An enumerated type declares an optional type name and a set of zero or more identifiers that can be used as values of the type. Each enumerator is a constant whose type is the enumeration. These are also called as enumerated constants.
How are enumeration variables declared in C?
The keyword ‘enum’ is used to declare new enumeration types in C and C++. Following is an example of enum declaration. In the above example, we declared “day” as the variable and the value of “Wed” is allocated to day, which is 2.
What will happen when defining the enumerated type?
What will happen when defining the enumerated type? Explanation: Enumerator will allocate the memory when its variables are defined. Explanation: The enum variable is converted to an integer and stored by the compiler. So both are equal in size.
What is identifier in C?
In C language, an identifier is a combination of alphanumeric characters, i.e. first begin with a letter of the alphabet or an underline, and the remaining are letter of an alphabet, any numeric digit, or the underline.
What is the difference between enum and #define constant in C?
enum defines a syntactical element. #define is a pre-preprocessor directive, executed before the compiler sees the code, and therefore is not a language element of C itself. Generally enums are preferred as they are type-safe and more easily discoverable.
What is the advantage of enum in C?
The use of an enumeration constant (enum) has many advantages over using the traditional symbolic constant style of #define. These advantages include a lower maintenance requirement, improved program readability, and better debugging capability.
Which is better #define or enum?
enum offers you scoping and automatic value assignment, but does not give any control over the constant type (always signed int ). #define ignores scoping, but allows you to use better typing facilities: lets you choose the constant type (either by using suffixes or by including an explicit cast into the definition).
When would an enum or enumeration be used?
Whenever a procedure accepts a limited set of variables, consider using an enumeration. Enumerations make for clearer and more readable code, particularly when meaningful names are used. The benefits of using enumerations include: Reduces errors caused by transposing or mistyping numbers.
When we use inline function What will happen?
Inline functions provide following advantages: 2) It also saves the overhead of push/pop variables on the stack when function is called. 3) It also saves overhead of a return call from a function. 4) When you inline a function, you may enable compiler to perform context specific optimization on the body of function.
What is class in C Plus Plus?
A class in C++ is a user-defined type or data structure declared with keyword class that has data and functions (also called member variables and member functions) as its members whose access is governed by the three access specifiers private, protected or public. By default access to members of a C++ class is private.