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What is a class?

A class is a user-defined data type in C++. A class can be defined using the keyword class followed by the name of the class. A class can contain member variables and member functions. Member variables are the data members of a class and member functions are the functions that the object of a class can access.

A class is a user-defined data type that contains both variables and functions.


A class is a user-defined data type that contains both variables and functions. Classes are used to implement Object-Oriented Programming (OOP) in C++.

Classes define objects which represent a collection of data and functions which operate on that data. For example, a class could be used to represent a bank account, which would contain data such as the account balance and the account holder’s name, as well as functions such as deposit() and withdraw().

Classes can be thought of as templates for creating objects. An object is an instance of a class. For example, if we have a class called Account, we can create an object called myAccount which is an instance of the Account class.

A class can be thought of as a template for creating objects.


A class is a code construct that allows you to create your own data types and define the properties and methods associated with those data types. In other words, you can use classes to create your own custom objects. These custom objects can be very simple, such as a Point class that represents a point in two-dimensional space, or they can be very complex, such as a web browser.

You define a class by specifying the code for the properties and methods that make up the class. Once you have defined a class, you can use it to create objects. The objects created from your class are called instances of the class. When you create an instance of a class, you can specify the values for the properties of that instance. You can also call the methods defined by the class on that instance.

What is the difference between a class and a struct?

A class is a blueprint for an object, and a struct is a blueprint for a data structure. A class can contain data and code, whereas a struct can only contain data. A class can have member functions, whereas a struct cannot. A class can have a destructor, whereas a struct cannot.

A class is a reference type, while a struct is a value type.

The main difference between a class and a struct is that a class is a reference type, while a struct is a value type. This means that when you create an instance of a class, you are creating a new object that is stored in memory. When you create an instance of a struct, you are creating a new value that is copied into memory.

This has some important implications. For example, if you pass an instance of a class to a method, the method can change the state of the object. If you pass an instance of a struct to a method, the method cannot change the state of the struct.

Another difference between classes and structs is that structures do not support inheritance, while classes do. This means that you can create subclasses of classes, but not subclasses of structs.

A class can contain methods, while a struct cannot.


In addition to methods, classes can contain other members such as properties, constants, and events. A struct cannot contain methods, however, it can contain properties, constants, and events. A class is a reference type, while a struct is a value type. This means that when you assign an instance of a class to a variable, you are actually assigning a reference to that instance. When you assign an instance of a struct to a variable, on the other hand, you are assigning the value of the struct to the variable.

Further Reading

Sources

What’s the Difference Between Classes and Structs? – stackoverflow

What is the difference between a class and a union?

A class is a user defined data type, which can contain data members and member functions. A union is a data type that allows you to store multiple data types in the same memory location. Let’s take a closer look at the differences between these two types.

A class can contain multiple data types, while a union can only contain one data type.

A class can contain multiple data types, while a union can only contain one data type. A union is a special data type that is similar to a class, except that it can only contain one value at a time. A union is useful when you want to store different values in the same location, but you only want to use one of those values at a time.

A union can only be used to store data, while a class can be used to store data and functions.

A union is a type of data structure that allows you to store different types of data in the same memory location. You can only store one type of data at a time, but you can change the type of data that is stored in the union. A class is a type of data structure that allows you to store data and functions. You can store multiple types of data in a class, and you can access the functions in a class to perform operations on the data.


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