Lesson 4 Practice — Bank Account Object

Create:

ZCL_BANK_ACCOUNT_###
ZCL_ABAP_L04_PRACTICE_###

Bank Account state

Keep private:

account_id
owner_name
balance

Public API

Create:

constructor
deposit
withdraw
get_account_id
get_owner_name
get_balance

Rules:

initial balance cannot be negative
deposit must be > 0
withdraw must be > 0
withdraw cannot exceed balance

withdraw should return abap_bool indicating success.

Runner

Create at least two accounts and prove their balances are independent.

Questions

1. Why is balance private?
2. Why is withdraw better than a generic set_balance?
3. What does NEW return?
4. What does -> mean?
5. What is the difference between a class and an object?