How Class members are Accessing in program ?

Accessing Class members  as below:

• Private data of a class can be accessed only through the member functions of the that class . 
• The format for calling a member function is 

object name. function name (parameters)

• For example the function call statement could be 

x.getdata(10,10.5);
x.putdata();

• Objects can communicate by sending and receiving messages. 
• x.putdata() sends a message to the object x requesting it to display its contents.