Q3. Programming Task

In this task, you will build a calculator program that will perform the following operations:

• Basic addition (+), subtraction (-), multiplication (*), and division (/) operations

• Calculate the sum of N integers (N < 5)

• Calculate the factorial of the first N integer (N < 10)

The calculator will interface with the end users as follow:

After the program starts, print the following menu:

Welcome to PROG5001 calculator:

*****************************************************************

* Type 1 and press enter to perform basic calculation

* Type 2 and press enter to calculate the sum of N integers (N < 5)

* Type 3 and press enter to calculate the factorial of the first N integers (N < 10)

******************************************************************

Your choice:

After user select option 1 (type 1, press enter), the menu will appear as follow:

Welcome to PROG5001 calculator:

*****************************************************************

* Type 1 and press enter to perform basic calculation

* Type 2 and press enter to calculate the sum of N integers (N < 5)

* Type 3 and press enter to calculate the factorial of the first N integers (N < 10)

******************************************************************

Your choice:1

Input your operator [+.-,*,/] and press enter:+

Input your numbers and press enter:1 2

The result is: 3

Press enter to continue …

After user select option 2 (type 2, press enter), the menu will appear as follow:

Welcome to PROG5001 calculator:

*****************************************************************

* Type 1 and press enter to perform basic calculation

* Type 2 and press enter to calculate the sum of N integers (N < 5)

* Type 3 and press enter to calculate the factorial of the first N integers (N < 10)

******************************************************************

Your choice:2

Input N and press enter:4

Input your first number and press enter:1

Input your second number and press enter:2

Input your third number and press enter:3

Input your fourth number and press enter:4

The result is: 10

Press enter to continue …

After user select option 3 (type 3, press enter), the menu will appear as follow:

Welcome to PROG5001 calculator:

*****************************************************************

* Type 1 and press enter to perform basic calculation

* Type 2 and press enter to calculate the sum of N integers (N < 5)

* Type 3 and press enter to calculate the factorial of the first N integers (N < 10)

******************************************************************

Your choice:3

Input N and press enter:3

The factorial of 3 is: 18

Press enter to continue …

In completion this task, you will demonstrate:

• How to modify the basic calculator class given to you in the first 6 weeks to build this more advanced calculator program.

• How to use Scanner class to handle user input

• How to use basic control structure (condition, loop) to handle the menu system

• How to use array or collection class to store data