michael-m-aher / oop-course

Assignments of the OOP course - Fall 2021

Assignments of the OOP course - Fall 2021

These assignments provide us a practice exposure and knowledge enhancement of the subjects we learned.

Assignment 1

Description:

A class ColoredBox which stores a box of characters (Dynamic 2D array).

Functions:

• display function that prints the box
• displayTransposed that displays the box transposed

• displayWider that displays the box on a wider scale

• A function that takes a color and displays the box as a chess board

• getArea that returns the calculated area of the box
• static member function getMaxArea that returns the value of the static member variable.

Assignment 2

Online Shopping System (practice on operator overloading)

Description:

Develop a set of functions for an online shopping system. The system is represented by the following structure:

• Class Item that have : ID, name, quantity, price

  • Operator overloading for the ==, +=,-=, >> and << operators

• Class Seller that have : name, email, items,maxItems

  • To add an item in the sellers items:
    • If the item already exists in the seller's items you will increase the item’s quantity by the quantity of the parameter item using the (+=) in Item class, and the price of the parameter object will be ignored. Use the == operator for this where an item is equal to another if they have the same name.
    • Else the item will be added to the seller’s items.
  • To sell an item:
    • If the quantity is <= item’s quantity you will decrease it from item Using the (-=) in Item class.
    • Else print for the user the quantity left for this item.
  • To Print Items:
    • print each item using the (<<) operator.
  • To Find an Item by ID:
    • This returns an Item object (or a pointer to Item) with the specified ID if there is an item with such ID.

Assignment 3

Practice on Files, Inheritance and Polymorphism

Description:

There are 5 classes: FloatArray, SortedArray, FrontArray, PositiveArray & NegativeArray.

• FloatArray:
  • stores a dynamic array of floats
  • An add method that adds a float at the end of the array
  • Overloading for the insertion operator << to write the array to a file (ofstream)
  • Overloading for the extraction operator >> to read the array elements from the file (ifstream) and add them to the array
• The SortedArray inherits from FloatArray:
  • An add method that adds a float at the right place in the array such that the array remains sorted with every add
• The FrontArray inherits from FloatArray:
  • An add method that adds a float at the front of the array
• The PositiveArray that inherits from SortedArray:
  • An add method that adds a float to the array only if it’s a positive number. It then uses the add method of SortedArray.
• The NegativeArray that inherits from SortedArray:
  • An add method that adds a float to the array only if it’s a negative number. It then uses the add method of SortedArray

The only input to the program is the names of the input txt file and output txt file name

Sample of the Input file:

Sorted 10   8.4 -4 2.3 11 80 7 77 95 12 100
Array 7     3.4 2 0 9 4.7 3 9
Front 5     8 4 7.9 0.44 1
Array 6     45 23 8.5 3.98 4 2.5
Sorted 4    90 6 4 111
Sorted 8    7 3 4 0 1.1 3.2 88 9
Array 6     13.5 7.6 9 33 1 0
Front 3     7 5 1.5
Positive 7  7.9 -1 -44 9.7 4.3 -1 0
Negative 8  88 -1.5 -40 -9.7 4.3 13 0 -11

Sample of the Output file:

10|	-4	2.3	7	8.4	11	12	77	80	95	100	
7|	3.4	2	0	9	4.7	3	9	
5|	1	0.44	7.9	4	8	
6|	45	23	8.5	3.98	4	2.5	
4|	4	6	90	111	
8|	0	1.1	3	3.2	4	7	9	88	
6|	13.5	7.6	9	33	1	0	
3|	1.5	5	7	
3|	4.3	7.9	9.7	
4|	-40	-11	-9.7	-1.5