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POProcess to pass from problem to code. How did you learn?
 

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  1. POProcess to pass from problem to code. How did you learn?
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    <p>I'm teaching/helping a student to program.</p> <p>I remember the following process always helped me when I started; It looks pretty intuitive and I wonder if someone else have had a similar approach.</p> <ol> <li>Read the problem and understand it ( of course ) .</li> <li>Identify possible "functions" and variables.</li> <li>Write how would I do it step by step ( algorithm ) </li> <li>Translate it into code, if there is something you cannot do, create a function that does it for you and keep moving.</li> </ol> <p>With the time and practice I seem to have forgotten how hard it was to pass from problem description to a coding solution, but, by applying this method I managed to learn how to program.</p> <p>So for a project description like: </p> <blockquote> <p><em>A system has to calculate the price of an Item based on the following rules ( a description of the rules... client, discounts, availability etc.. etc.etc. )</em></p> </blockquote> <p>I first step is to understand what the problem is.</p> <p>Then identify the item, the rules the variables etc.</p> <p>pseudo code something like:</p> <pre><code>function getPrice( itemPrice, quantity , clientAge, hourOfDay ) : int if( hourOfDay &gt; 18 ) then discount = 5% if( quantity &gt; 10 ) then discount = 5% if( clientAge &gt; 60 or &lt; 18 ) then discount = 5% return item_price - discounts... end </code></pre> <p>And then pass it to the programming language..</p> <pre><code>public class Problem1{ public int getPrice( int itemPrice, int quantity,hourOdDay ) { int discount = 0; if( hourOfDay &gt; 10 ) { // uh uh.. U don't know how to calculate percentage... // create a function and move on. discount += percentOf( 5, itemPriece ); . . . you get the idea.. } } public int percentOf( int percent, int i ) { // .... } } </code></pre> <p>Did you went on a similar approach?.. Did some one teach you a similar approach or did you discovered your self ( as I did :( ) </p>
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    1. COTwo people has suggested TDD. That did exits when I started. Would this be the way to go? Is not too advanced for a beginner?
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    2. COIMHO programming can be (over)simplified to be about input-processing-output. TDD is about knowing what the inputs and outputs are and then **slowly ** building up the processing part, cleanly. I am confident that a beginner can grasp that simple concept. You don't even need to mention TDD :)
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    3. CO@jop: I disagree with that being an oversimplification :) Even complex systems can be boiled down to input/processing/output, you just have to allow for multiple inputs occurring over the lifetime of the program.
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