What is reference type in C++?

References are the third basic kind of variable that C++ supports. A reference is a C++ variable that acts as an alias to another object or value. C++ supports three kinds of references: References to non-const values (typically just called “references”, or “non-const references”), which we’ll discuss in this lesson.

What is reference in C++ with example?

C++ References Advertisements. A reference variable is an alias, that is, another name for an already existing variable. Once a reference is initialized with a variable, either the variable name or the reference name may be used to refer to the variable.

What is reference variable explain with example?

A reference variable is a variable that points to an object of a given class, letting you access the value of an object. For example, you can retrieve a row from a database table and assign all values from the row to a single object and then pass the object to a called procedure.

What are the types of reference in C #?

There are two kinds of types in C#: reference types and value types. Variables of reference types store references to their data (objects), while variables of value types directly contain their data.

How are reference types different from value types?

Variables of reference types store references to their data (objects), while variables of value types directly contain their data. With reference types, two variables can reference the same object; therefore, operations on one variable can affect the object referenced by the other variable.

How does passing by reference work in C?

Your example works because you are passing the address of your variable to a function that manipulates its value with the dereference operator. While C does not support reference data types, you can still simulate passing-by-reference by explicitly passing pointer values, as in your example.

How do you create a reference in C + +?

Creating References in C++ Think of a variable name as a label attached to the variable’s location in memory. You can then think of a reference as a second label attached to that memory location. Therefore, you can access the contents of the variable through either the original variable name or the reference.