IB Computer Science Problem Solving Part 2

It is a lot easier to write programs when you take a few minutes and think of the process that needs to occur in order for you to write your code. It is also important to know when you have finished your code if it is working properly.

• In the last lesson you were introduced to the input – processing – output method of problem solving using pseudocode.
• The curriculum requires you to formalize this and demonstrate to me that you are following this procedure when writing your programs.

In this lesson I’m going to give you an exemplar on how you should be submitting your programming assignments so that they will meet the curriculum expectations

Example – Suppose I give you a question that says the following:

Write a program that asks the user for 3 sides of a triangle and then calculates all the interior angles of that triangle to 1 decimal spot

Your solution will have 3 parts to it:

Part #1 – The Problem Solving

• Here is where you will following the IPO method and plan out your program.
• This is done BEFORE you write the code!!!!
• It doesn’t have to be super detailed, but enough information should be given so that you could give it to any programmer and they could use it to write the code.
• Input
  • Accept 3 whole numbers from the user (store as integer values)
  • Each one will be one side of the triangle
  • Not going to worry if the sides actually DO form a triangle, let’s just assume the user will enter the proper values as input
  • Processing
    • Here is the Math I’m going to need to use to calculate the interior angles
    • I will need 3 variables (doubles) to store the 3 angles
      • My program will likely have the following flow
        • Set the BufferedReader Variables for input
        • Declare input and output variables
        • Get the input from the user using readLine Statements
        • Apply the formula 3 times changing the sides used for a,b,c each time.
  • Output
    • The values need to be to 1 decimal spot so I will need to apply that in my print statements
    • Choose to output 1 angle per line.