New design criterion in ALGOL 68:

Orthogonality was the primary design criterion for ALGOL 68.

Orthogonally in a programming language means combining a relatively small set of primitive constructs build large control and data structures of the language.

So, the important result of orthogonality in ALGOL was introduction of user defined data types.

ALGOL 68 provided only very few primitive data types and structures...

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Chapter 2, Problem 31RQ

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• Create a public method called deposit() that takes in an amount of type double as input and adds the amount to the current balance. This method should also return the updated balance. • Create another public method called withdraw() that takes in an amount of type double as input, checks if the withdrawal amount is less than the current balance, and if so, subtracts the amount from the balance. If the withdrawal amount is greater than the current balance, the method should return an error message "Insufficient balance". • Create a public method getAccountInfo() that returns the account information in the format "Account Number: xxxxx, Account Holder: John Doe, Account Type: SAVINGS/CHECKING, Balance: $xxxX.XX". • Finally, create a constructor method that takes in the account number, account holder name, initial balance and account type as input and initializes the corresponding instance variables. In the BankAccount class, make sure to use the private access modifier for the instance…

Create a BankAccount Test class that contains a main() method that instantiates an object of type BankAccount, with account number of 12345, account holder name of "John Doe", initial balance of $1000 and account type as SAVINGS . Then use the deposit() and withdraw() methods of the object to deposit $500 and withdraw $300. Finally, use the getAccountInfo() method to print the current account information. Use the getAccountInfo() method to verify that the deposit and withdrawal actions are performed correctly and that the account information is updated accordingly.

Add a new class checkingAccount that inherits from the BankAccount class, and has a double instance variable overdraft Limit in addition to the variables inherited from the superclass. • Create a constructor for the checking Account class that takes in the account number, account holder name, initial balance, account type and overdraft limit as input, and uses the super keyword to call the constructor of the superclass, passing in the account number, account holder name and initial balance, account type. • Re-write the withdraw() method in the checkingAccount class so that it first checks if the withdrawal amount is less than the current balance plus the overdraft limit. If it is, the withdrawal is allowed and the balance is updated. If not, the method should return an error message "Insufficient funds". • Create a new method displayOverdraft Limit() that returns the overdraft limit of the CheckingAccount . • In the BankAccountTest class, create a new object of type Checking Account…

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Concepts Of Programming Languages

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Solution Summary: The author explains that orthogonality was the primary design criterion for ALGOL 68. It meant combining a relatively small set of primitive constructs to build large control and data structures.

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