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Friday, February 28, 2020

Exercises with solutions on OOP - object oriented programming in Python

Exercise 41. Rectangle class: ||  Solution

  1. Write a Rectangle class in Python language, allowing you to build a rectangle with length and width attributes.
  2. Create a Perimeter() method to calculate the perimeter of the rectangle and a Area() method to calculate the area of ​​the rectangle.
  3. Create a method display() that display the length, width, perimeter and area of an object created using an instantiation on rectangle class.
  4. Create a Parallelepipede child class inheriting from the Rectangle class and with a height attribute and another Volume() method to calculate the volume of the Parallelepiped.

Exercice 42: Person class and child Student class ||  Solution

  1. Create a Python class Person with attributes: name and age of type string.
  2. Create a display() method that displays the name and age of an object created via the Person class.
  3. Create a child class Student  which inherits from the Person class and which also has a section attribute.
  4. Create a method displayStudent() that displays the name, age and section of an object created via the Student class.
  5. Create a student object via an instantiation on the Student class and then test the displayStudent method.

Exercise 43. Bank Account class: ||  Solution

  1. Create a Python class called BankAccount which represents a bank account, having as attributes: accountNumber (numeric type), name (name of the account owner as string type), balance.
  2. Create a constructor with parameters: accountNumber, name, balance.
  3. Create a Deposit() method which manages the deposit actions.
  4. Create a Withdrawal() method  which manages withdrawals actions.
  5. Create an bankFees() method to apply the bank fees with a percentage of 5% of the balance account.
  6. Create a display() method to display account details.
  7. Give the complete code for the  BankAccount class.

Exercise 44. Circle class

1 - Define a Circle class allowing to create a circleC (O, r) with center O(a, b) and radius r using the constructor:
    def __init__(self,a,b,r):         
        self.a = a         
        self.b = b         
        self.r = r
2 - Define a Area() method of the class which calculates the area of ​​the circle.
3 - Define a Perimeter() method of the class which allows you to calculate the perimeter of the circle.
4 - Define a testBelongs() method of the class which allows to test whether a point A(x, y) belongs to the circle C(O, r) or not.

Exercise 45. Computation class:

1 - Create a Coputation class with a default constructor (without parameters) allowing to perform various calculations on integers numbers.
2 - Create a method called Factorial() which allows to calculate the factorial of an integer. Test the method by instantiating the class.
3 - Create a method called Sum() allowing to calculate the sum of the first n integers 1 + 2 + 3 + .. + n. Test this method.
4 - Create a method called testPrim() in  the Calculation class to test the primality of a given integer. Test this method.
4 - Create  a method called testPrims() allowing to test if two numbers are prime between them.
5 - Create a tableMult() method which creates and displays the multiplication table of a given integer. Then create an allTablesMult() method to display all the integer multiplication tables 1, 2, 3, ..., 9.
6 - Create a static listDiv() method that gets all the divisors of a given integer on new list called  Ldiv. Create another listDivPrim() method that gets all the prime divisors of a given integer.

Exercise 46

  1.  Define a Book class with the following attributes: Title, Author (Full name), Price.
  2. Define a constructor used to initialize the attributes of the method with values entered by the user.
  3. Set the View() method to display information for the current book.
  4. Write a program to testing the Book class.

Exercise 47

Write a Geometry class with default constructor having no parameters.
  1. Write a methode in Geometry class called distance() that allow to compute a distance between two points A = (a1, a2), B = (b1, b2) (with the convention: a point M is identified with its pair of coordinates M = ( x, y)).
  2.  Write a methode in Geometry class called middle() allowing to determine the midle of bipoint (A,B).
  3. Write method called trianglePerimeter() allowing to compute the perimeter of triangle
  4. Write method called triangleIsoscel() which returns a True if the triangle is isoscel and False if not.

Exercise 48

Coding a class named myString inheriting from the str class allowing to endow strings with append() and pop () methods doing the same operations as those of lists class.

Younes Derfoufi

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