Some simple algorithms

• I'm probably going to use some math examples here.
• Write an algorithm to change temperature from Fahrenheit to Celsius and back.
  • The input should be the current temperature and the current unit.
  • The output should be the temperature in the desired unit.
  • $c = \frac{5}{9}(f-32)$
  • $f = \frac{9}{5}c + 32$.
• Try this 130 assignment.
• Can we write an algorithm to convert a bit string "10110101" to a decimal number?
  • If we use an idea like
    • for each bit in the number from first to last
    • we are using a counter controlled loop
    • We know how many times we will execute the loop
• Let's write an algorithm for a program that will encode a message using the Caesar cipher.
• Let's extend this algorithm to one that will encode multiple messages.
  • We should ask each time if they want to encode a message.
  • We should ask for the shift amount.
  • We should ask for the message.
  • We should print the message.
  • Another homework assignment.
• When we do a loop like
  • While the user wants to encode a message
  • We are using an event controlled loop.
  • We continue to loop until something happens.