CityU 2020-21 SPE10117

SPE10117 Foundations in Information Systems

Programming Exercise

Given the following simple program to calculate area of a circle:


'''
filename: circleArea.py             
                                                     
This program asks the user to input a               
number for the radius of a circle.  The program     
then calculates and output the area of the circle.
'''

import math
import sys
radius = float(input( "Enter radius in feet : " )) 
area = math.pi * radius * radius 
sys.stdout.write("The radius you provided was " + format(radius,'.2f') +
                " feet and the area is about " + format(area,'.2f') + " sq feet" )

Write a function called computeArea() which will compute the area of a circle given the radius. The function should receive the radius in a parameter list and return the computed area as the function returns value. A sample call to the function would be as follows:

area = computeArea(radius)

Modify the program circleArea.py given above to make use of this function.

The basic loan has three parameters: the annual interest rate, monthly payment, and loan balance.
As an example, consider a $300 loan at 12% annual (i.e., 1% monthly) interest, which is being paid off at $100 per month.
After the first month, the balance is $200, but after interest, it increases to $202.
After the second month, the balance is $102, but after interest, it increases to $103.02.
After the third month, the balance is 3.02, which after interest increases to $3.05.
The remainder is paid off in the fourth month.
Write a Python program that prompts for the three parameters and conveys this information in a nice table. You can assume the loan will be paid off in less than five months. For example:
```
	The loan amount is : 300
	The annual interest rate is: 12
	The monthly payment is: 100

		Starting            Middle              Ending
	Month	Balance   Payment   Balance   Interest  Balance
	-------------------------------------------------------
	1.	300.00	  100.00    200.00       2.00   202.00	
	2.	202.00    100.00    102.00       1.02   103.02
	3.	103.02    100.00      3.02       0.03     3.05
	4.	  3.05      3.05      0.00       0.00     0.00
```
Run your program with the following 3 sets of sample data:
1)300 12 100
2)1000 15 350
3)12345 33.25 3888.88

Given the following program in Week 4 LabAndTut folder:


'''
filename:filep41.py

Read datafile1.dat in text format, create a list, print the 
list to console and create a html table in output.html 
'''

fileIn = open('datafile1.dat', 'r')
fileOut = open('output.html','w')
data=[]

lines = fileIn.read().splitlines()

for line in lines:
    transactionRecord = line.split('_')
    data.append(transactionRecord)
    
print('%-20s%-30s%5s%10s'%('Name','Address','Txn', 'Ampunt'))
print('='*65)

for e in data:
    print('%-20s%-30s%5s%10s'%(e[0], e[1], e[2], e[3]))

fileOut.write('''
<table border=1>
<tr><th>Name</th><th>Address</th><th>Txn</th>Amount</th></tr>
''')
for e in data:
    fileOut.write('<tr><td>'+e[0]+'</td>' +
                   '<td>'+e[1]+'</td>' +
                   '<td>'+e[2]+'</td>' +
                   '<td>'+e[3]+'</td>' + '</tr>')
                  
fileOut.write('</table>')
                  
fileIn.close()
fileOut.close()

Modify the program to output the table using markdown, upload output.md to github after you finished.