What is Object and Class? What are the differences between
them?
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Answer Posted / pankaj vashishta
Class is template for creating similar type of entities.
Class doesn't take memory space untill it contains static
members.
In a specific Class, you declare the attributes(field
variables) and its behaviour(functions).
But Class doesn't have any state and identity.
Objects are the real time entity which are created through
their template, thier class.
By real time entity, I mean they would occupy a memory
space in which they will save the values of its atrributes.
These values create a state of an object.
Since Object occupy a space in memory so they have unique
address in memory. This become the identity of an object.
For example : Pen is a class, which has weight and color as
its attribute. They may have behaviour like write().
Still they don't occupy a space in memory.
When I say My pen ,It will be an object of class Pen since
it will have some values for weight like 10 gm and color
like blue. This will occupy some memory to save these
values.
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Objective The objective of this problem is to test the understanding of Object-Oriented Programming (OOP) concepts, in particular, on encapsulation. Problem Description Create a program for managing customer’s bank accounts. A bank customer can do the following operations: 1. Create a new bank account with an initial balance. 2. Deposit money into his/her account. 3. Withdraw money from his/her account. For this operation, you need to output “Transaction successful” if the intended amount of money can be withdrawn, otherwise output “Transaction unsuccessful” and no money will be withdrawn from his/her account. Input The input contains several operations and is terminated by “0”. The operations will be “Create name amount”, “Deposit name amount”, or “Withdraw name amount”, where name is the customer’s name and amount is an integer indicating the amount of money. There will be at most 100 bank accounts and they are all created on the first month when the bank is opening. You may assume that all account holders have unique names and the names consist of only a single word. Output The output contains the transaction result of withdrawal operations and the final balance of all customers after some withdrawal and deposit operations (same order as the input). Sample Input Create Billy 2500 Create Charlie 1000 Create John 100 Withdraw Charlie 500 Deposit John 899 Withdraw Charlie 1000 0
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