What is the use of classes?

The class is a blueprint that defines a nature of a future object. An instance is a specific object created from a particular class. Classes are used to create and manage new objects and support inheritance —a key ingredient in object-oriented programming and a mechanism of reusing code.

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Do I need to use classes in C++?

No, you should not put everything into classes . Whoever told you that was wrong. C++ is not (just) an OO language, it is a multi-paradigm language. Additionally, putting everything into classes does not mean that code is object oriented (especially since for static methods you don’t need actual objects, just types).

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How we can access the members of union?

Difference between structure and union in C: C StructureC UnionWe can access all members of structure at a time.We can access only one member of union at a time.Structure example: struct student { int mark; char name[6]; double average; };Union example: union student { int mark; char name[6]; double average; };C Union with examples – Fresh2Refresh fresh2refresh.com › C Programming Tutorial

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What is structure and union with example?

A structure contains an ordered group of data objects . Unlike the elements of an array, the data objects within a structure can have varied data types. Each data object in a structure is a member or field. A union is an object similar to a structure except that all of its members start at the same location in memory.

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