Question

PLEASE DO BOTH OF THESE IN PYTHON

1) Exercise #1: Design and implement class Rectangle to represent a rectangle object. The class defines the following attributes (variables) and methods:

Two Class variables of type double named height and width to represent the height and width of the rectangle. Set their default values to 1.0 in the default constructor.

A non-argument constructor method to create a default rectangle.

Another constructor method to create a rectangle with user-specified height and width.

Python only: use the classmethod decorator

Method getArea() that returns the area.

Method getPerimeter() that returns the perimeter.

Method getHeight() that returns the height.

Method getWidth() that returns the width.

Now design and implement a test program to create two rectangle objects: one with default height and width, and the second is 5 units high and 6 units wide. Next, test the class methods on each object to print the information as shown below.

Sample run:

First object:

Height:     1 unit

Width:      1 unit

Area:       1 unit

Perimeter: 4 units

Second object:

Height:     5 unit

Width:      6 unit

Area:       30 units

Perimeter: 22 units

2) Exercise #2: Design and implement class Stock to represent a company’s stock. The class defines the following attributes (variables) and methods:

A class variable of type String named Symbol for the stock’s symbol.

A class variable of type String named Name for the stock’s name.

A class variable of type double named previousClosingPrice to store the last closing price.

A class variable of type double named currentPrice to store the current price.

A constructor method to create a stock with user-specified name and symbol.

Method getName() that returns the stock’s name.

Method getSymbol() that returns the stock’s symbol.

Method setClosingPrice() that sets the previous closing price.

Method setCurrentPrice() that sets the current price.

Method getChangePercent() that returns the percentage changed from

previousClosingPrice to currentPrice.

Use the formula: (currentPrice - previousClosingPrice)/ currentPrice * 100

Method named toString() (Java & C#) or ___str___() (Python) to printout a meaningful description of a stock object when passing the object name to the print statement.

e.g.: The statement PRINT yahooStock would print the string:

Yahoo stock’s closing price is $234.54.

Now design and implement a test program to create two stock objects: one for Google with symbol GOG and the second is for Microsoft with symbol MSF. Set their closing and current prices according to the information below. Next, test the class methods on each object to print in the information in a similar manner to the one shown below:

Sample run:

Google stock:

Symbol: GOG     

Closing price: 134.67

Current price: 131.98

Change percent: - 2%

Google stock closing price is $131.98

Microsoft stock:

Symbol: MSF     

Closing price: 156.52

Current price: 161.22

Change percent: 3%

Microsoft stock closing price is $161.22

Answer 1

Here is the first part

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class Rectangle():

    def __init__(self,height=1.0,width=1.0):
        self.height=height
        self.width=width

    def getArea(self):
        return self.height*self.width
    def getPerimeter(self):
        return 2*(self.width+self.height)
    def getHeight(self):
        return self.height
    def getWidth(self):
        return self.width


def main():
    first_rectangle=Rectangle()
    second_rectangle=Rectangle(5,6)
    print('First Object')
    print('Height:',first_rectangle.getHeight(),'unit')
    print('Width:',first_rectangle.getWidth(),'unit')
    print('Area:',first_rectangle.getArea(),'unit')
    print('Perimeter:',first_rectangle.getPerimeter(),'units')

    print('Second Object')
    print('Height:',second_rectangle.getHeight(),'unit')
    print('Width:',second_rectangle.getWidth(),'unit')
    print('Area:',second_rectangle.getArea(),'units')
    print('Perimeter:',second_rectangle.getPerimeter(),'units')

main()

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Here is Part 2

class Stock():
    def __init__(self,sym,name):
        self.symbol=sym
        self.name=name
        self.previousClosingPrice=0.0
        self.currentPrice=0.0

    def getName(self):
        return self.name
    def getSymbol(self):
        return self.symbol
    def setClosingPrice(self,price):
        self.previousClosingPrice=price
    def setCurrentPrice(self,price):
        self.currentPrice=price
    def getChangePercent(self):
        return (self.currentPrice-self.previousClosingPrice)/(0.01*self.currentPrice)

    def __str__(self):
        return '{0} stock Symbol: {1}, Closing Price: {2}, Current Price: {3}, Change Percent: {4}% '.format(\
            self.name,self.symbol,self.previousClosingPrice,self.currentPrice,(int)(self.getChangePercent()))


def main():
    microsoft=Stock("MSF","Microsoft")
    microsoft.setClosingPrice(156.52)
    microsoft.setCurrentPrice(162.22)
    print(microsoft)

    google=Stock("GOG","Google")
    google.setClosingPrice(134.67)
    google.setCurrentPrice(131.98)
    print(google)

main()

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