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STAIR Design Method STAIR

STAIR Design Method STAIR State the problem

STAIR Design Method STAIR State the problem Tool identification

STAIR Design Method STAIR State the problem Tool identification Algorithm

STAIR Design Method STAIR State the problem Tool identification Algorithm Implementation

STAIR Design Method STAIR State the problem Tool identification Algorithm Implementation Refinement

STAIR – Step 1

STAIR – Step 1 State the problem

STAIR – Step 1 State the problem Clear and concise

STAIR – Step 1 State the problem Clear and concise Just a sentence (to maybe a paragraph)

STAIR – Step 1 State the problem Clear and concise Just a sentence (to maybe a paragraph) Indicates what you want to accomplish

STAIR – Step 1 State the problem Clear and concise Just a sentence (to maybe a paragraph) Indicates what you want to accomplish As non-technical as possible

STAIR – Step 1 State the problem Clear and concise Just a sentence (to maybe a paragraph) Indicates what you want to accomplish As non-technical as possible Very important!

STAIR – Step 1 State the problem Clear and concise Just a sentence (to maybe a paragraph) Indicates what you want to accomplish As non-technical as possible Very important! If you can’t simply state what you are supposed to do…

STAIR – Step 1 State the problem Clear and concise Just a sentence (to maybe a paragraph) Indicates what you want to accomplish As non-technical as possible Very important! If you can’t simply state what you are supposed to do…how can you do it?

STAIR – Step 2

STAIR – Step 2 Tool identification

STAIR – Step 2 Tool identification The programming “stuff” you think you will need…

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions?

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart)

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop?

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information?

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information?

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information? (strings, numbers, …)

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information? (strings, numbers, …) How many?

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information? (strings, numbers, …) How many? For what?

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information? (strings, numbers, …) How many? For what? (user name, favorite color, …)

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information? (strings, numbers, …) How many? For what? (user name, favorite color, …) Will we need anything .NET provides?

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information? (strings, numbers, …) How many? For what? (user name, favorite color, …) Will we need anything .NET provides? Console.ReadLine and/or Console.WriteLine

STAIR – Step 2 Tool identification The programming “stuff” you think you will need… Will our program be making decisions? (diamonds in the flowchart) Will our program need to loop? Will I need variables to hold information? What type of information? (strings, numbers, …) How many? For what? (user name, favorite color, …) Will we need anything .NET provides? Console.ReadLine and/or Console.WriteLine Will we need any algorithms we’ve already written?

STAIR – Step 3 cont

STAIR – Step 3 cont Test Plan

STAIR – Step 3 cont Test Plan Before you write code

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong…boundary conditions

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong…boundary conditions Write out a plan:

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong…boundary conditions Write out a plan: We will look for these things to be working

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong…boundary conditions Write out a plan: We will look for these things to be working We will test these bad things to make sure our program still works right

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong…boundary conditions Write out a plan: We will look for these things to be working We will test these bad things to make sure our program still works right Do this before you write code!

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong…boundary conditions Write out a plan: We will look for these things to be working We will test these bad things to make sure our program still works right Do this before you write code! Play computer

STAIR – Step 3 cont Test Plan Before you write code Determine how to tell if your program is doing what it is supposed to Think through what may go wrong…boundary conditions Write out a plan: We will look for these things to be working We will test these bad things to make sure our program still works right Do this before you write code! Play computer “Run” your algorithm step-by-step to see if it does what you expect

STAIR – Step 4

STAIR – Step 4 Implementation

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005)

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code!

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code! Edit

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code! Edit Type in the C# code implementing your algorithms

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code! Edit Type in the C# code implementing your algorithms Compile

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code! Edit Type in the C# code implementing your algorithms Compile Translate your C# code into machine language

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code! Edit Type in the C# code implementing your algorithms Compile Translate your C# code into machine language The compiler will catch any language problems

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code! Edit Type in the C# code implementing your algorithms Compile Translate your C# code into machine language The compiler will catch any language problems Correct error and recompile

STAIR – Step 4 Implementation (using the IDE…Visual Studio 2005) This is the first time you are writing code! Edit Type in the C# code implementing your algorithms Compile Translate your C# code into machine language The compiler will catch any language problems Correct error and recompile Run the program!

STAIR – Step 5

STAIR – Step 5 Refinement

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time Two general types of bugs:

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time Two general types of bugs: Crashes

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time Two general types of bugs: Crashes You will get an error message and the debugger will show you what line of code the error occurred on.

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time Two general types of bugs: Crashes You will get an error message and the debugger will show you what line of code the error occurred on. Logic errors

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time Two general types of bugs: Crashes You will get an error message and the debugger will show you what line of code the error occurred on. Logic errors Your algorithm is wrong

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time Two general types of bugs: Crashes You will get an error message and the debugger will show you what line of code the error occurred on. Logic errors Your algorithm is wrong Program isn’t doing what you really intended

STAIR – Step 5 Refinement Rarely will it run correctly the 1st (or 2nd) time Two general types of bugs: Crashes You will get an error message and the debugger will show you what line of code the error occurred on. Logic errors Your algorithm is wrong Program isn’t doing what you really intended Remember, the computer does exactly what you tell it to!

Clear and Unclear Windows