Enumeration or Enum in C is a special kind of data type defined by the user. It consists of constant integrals or integers that are given names by a user. The use of enum in C to name the integer values makes the entire program easy to learn, understand, and maintain by the same or even different programmer.

What is enum & why it is used?

An enum type is a special data type that enables for a variable to be a set of predefined constants. The variable must be equal to one of the values that have been predefined for it. Common examples include compass directions (values of NORTH, SOUTH, EAST, and WEST) and the days of the week.

When should I use enum in C?

The enum program in the C programming language is used to define integral constant values, which is very helpful in writing clean and readable programs. Programmers normally use enumeration to define named integral constants in their programs to provide better readability and maintainability of the software.

What is enum class in C?

Enumeration (or enum) is a user defined data type in C. It is mainly used to assign names to integral constants, the names make a program easy to read and maintain.

What is enum keyword in C?

In C programming, an enumeration type (also called enum) is a data type that consists of integral constants. To define enums, the enum keyword is used. enum flag {const1, const2, …, constN}; By default, const1 is 0, const2 is 1 and so on.

What is an enum in programming?

An enumeration, or Enum , is a symbolic name for a set of values. Enumerations are treated as data types, and you can use them to create sets of constants for use with variables and properties.

What is the meaning of enum?

Enumeration or Enum in C is a special kind of data type defined by the user. It consists of constant integrals or integers that are given names by a user. The use of enum in C to name the integer values makes the entire program easy to learn, understand, and maintain by the same or even different programmer.

What is the difference between typedef and enum?

enum defines a type name automatically, While in case of typedef we define a new data type which may be of any kind of data type so that we do not have declare it explicitly everytime.

How big is an enum in C?

The C standard specifies that enums are integers, but it does not specify the size. Once again, that is up to the people who write the compiler. On an 8-bit processor, enums can be 16-bits wide. On a 32-bit processor they can be 32-bits wide or more or less.

What is the correct syntax of enum?

Explanation: The correct syntax of enum is enum flag{constant1, constant2, constant3, ……. };

What is an example of enumeration?

Enumeration means counting or reciting numbers or a numbered list. A waiter’s lengthy enumeration of all the available salad dressings might seem a little hostile if he begins with a deep sigh. When you’re reciting a list of things, it’s enumeration.

What is enum answer?

Enum is a java keyword and very useful in our everyday programming. We use Enum for a variable to be set of a predefined constant value. Before Java 1.5 we used public static final keywords to represent constants.

What are data types in C?

Types of Data Types in C

Floating-point, integer, double, character. Union, structure, array, etc. The basic data types are also known as the primary data types in C programming.

What is array in C?

Array in C can be defined as a method of clubbing multiple entities of similar type into a larger group. These entities or elements can be of int, float, char, or double data type or can be of user-defined data types too like structures.

What is header file in C?

A header file is a file with extension . h which contains C function declarations and macro definitions to be shared between several source files. There are two types of header files: the files that the programmer writes and the files that comes with your compiler.

What is pointers in C?

A pointer is a variable that stores the memory address of another variable as its value. A pointer variable points to a data type (like int ) of the same type, and is created with the * operator.

What is stack in C?

A stack is a linear data structure that follows the Last in, First out principle (i.e. the last added elements are removed first). This abstract data type​ can be implemented in C in multiple ways. One such way is by using an array. ​Pro of using an array: No extra memory required to store the pointers.

What is identifier in C?

“Identifiers” or “symbols” are the names you supply for variables, types, functions, and labels in your program. Identifier names must differ in spelling and case from any keywords. You cannot use keywords (either C or Microsoft) as identifiers; they are reserved for special use.

WHAT IS null pointer in C?

A null pointer is a pointer which points nothing. Some uses of the null pointer are: a) To initialize a pointer variable when that pointer variable isn’t assigned any valid memory address yet. b) To pass a null pointer to a function argument when we don’t want to pass any valid memory address.

Can a pointer be void?

The void pointer in C is a pointer that is not associated with any data types. It points to some data location in the storage. This means it points to the address of variables. It is also called the general purpose pointer.

What is data type long in C?

Longer integers: long

The long data type stores integers like int , but gives a wider range of values at the cost of taking more memory. Long stores at least 32 bits, giving it a range of -2,147,483,648 to 2,147,483,647. Alternatively, use unsigned long for a range of 0 to 4,294,967,295.

What is difference between far and near pointers?

Near pointer is used to store 16 bit addresses means within current segment on a 16 bit machine. The limitation is that we can only access 64kb of data at a time. A far pointer is typically 32 bit that can access memory outside current segment.

What is difference between array and pointer?

Array in C is used to store elements of same types whereas Pointers are address varibles which stores the address of a variable. Now array variable is also having a address which can be pointed by a pointer and array can be navigated using pointer.

What happens if you free a pointer twice?

If you free a pointer, the memory you freed might be reallocated. If that happens, you might get that pointer back. In this case, freeing the pointer twice is OK, but only because you’ve been lucky.