What is enum in C++ with example?

Enumeration is a user defined datatype in C/C++ language. It is used to assign names to the integral constants which makes a program easy to read and maintain. The keyword “enum” is used to declare an enumeration. enum colors{red, black}; enum suit{heart, diamond=8, spade=3, club}; The following is an example of enums.

How does enum work C++?

Enum is a user-defined data type that consists of a fixed set of constants or we can say a set of integral constants. The enum keyword is used to define an enumeration in the C++ programming language. It can be used to represent a set of directions and days as enum are implicitly final and static.

What is enumerated data type with example?

An enumeration is a data type that consists of a set of named values that represent integral constants, known as enumeration constants. An enumeration is also referred to as an enumerated type because you must list (enumerate) each of the values in creating a name for each of them.

Where are enums used?

Enums are used when we know all possible values at compile time, such as choices on a menu, rounding modes, command line flags, etc. It is not necessary that the set of constants in an enum type stay fixed for all time. In Java (from 1.5), enums are represented using enum data type.

How do you input an enum?

Since enumerations are treated as integers by the compiler, you must match manually set the integer for each enum to correspond to the ASCII code, then cast the integer input to your enumeration. Throws R = static_cast>(userOption); here you choose R or P or S based on need.

How do you create an enum?

Example of applying Enum on a switch statement

class EnumExample5{
enum Day{ SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY}
public static void main(String args[]){
Day day=Day.MONDAY;
switch(day){
case SUNDAY:
System.out.println(“sunday”);
break;

When to use enum?

You should always use enums when a variable (especially a method parameter) can only take one out of a small set of possible values. Examples would be things like type constants (contract status: “permanent”, “temp”, “apprentice”), or flags (“execute now”, “defer execution”).

What are the C data types?

C language supports 2 different type of data types: Primary data types: These are fundamental data types in C namely integer(int), floating point(float), character(char) and void. Derived data types: Derived data types are nothing but primary datatypes but a little twisted or grouped together like array, stucture, union and pointer.

What is enum in programming languages?

In computer programming, an enumerated type (also called enumeration, enum, or factor in the R programming language, and a categorical variable in statistics) is a data type consisting of a set of named values called elements, members, enumeral, or enumerators of the type.

What is enum class?

enum class is called a scoped enumeration. It prevents polluting the namespace where the enumeration appears with the names of the enumerators. In C++03, you could do effectively the same thing by putting the enum inside a dedicated class. Perhaps that’s the source of the syntax, which is a bit confusing.