what is the main function of class in c++?when we have to use class ?

[anireddy]

will u explain more about the class

[Dheeraj Joshi]

Please start reading the OOP concept first. You will get a clear picture.
Google and find more about classes..

Regards
Dheeraj Joshi

[newb16]

The main function of C++ class is being an implementation of 'object' paradigm of OOP. We _have_ to use it when usage of classes is required by external framework built upon classes itself.

[weaknessforcats]

There are no classes in C++.

All C++ has are structs.

The C++ "class" is implemented as a struct.

This:

struct MyStuff
{
     private:
         int data;
     public:
         void SetData(int);
         int   GetData();
         ///etc...
};

is exactly the same as:

class MyStuff
{
     private:
         int data;
     public:
         void SetData(int);
         int   GetData();
         ///etc...
};

That is, as long as you specify our member access as public/private/protected, there is no difference between a struct and a class.

There is one difference when you do not specify the member access. The default access for a struct will be public whereas the default access for a class will be private.

I suggest you expand your research into how to implement encapsulation.