1. Flowcharts Using Visio

2. Definitions  An Algorithm is just a detailed sequence of simple steps that are needed to solve a problem.  A Flowchart is a graphical representation of an algorithm.

3. Symbols Of the many Symbols available, these 7 Basic Symbols will be used most:

4. Example 1

5. Example 2

6. Example 3

7. Using Visio: start up

8. Drag shapes to the drawing pane Drag to place Double-click to add text Resize using bounding-box

9. Connect shapes with connectors Click the lower blue connection point on the shape. A red box appears around the connection point to show that the connector is “glued” to the shape. Once glued to a shape, the connector moves with the shape

10. the drawing grid Grid lines crisscross each drawing page like those on traditional graph paper. A grid helps you position shapes visually on a drawing page, and you can snap shapes to the grid. The grid does not print.

11. Working with the grid  Show or hide the grid: On the View menu, click Grid.  Set grid spacing: On the Tools menu, click Ruler & Grid.  Snapping: By default, shapes snap to both ruler subdivisions and grid lines. On the Tools menu, click Snap & Glue.  Glue:Glue is what keeps connectors attached to shapes.

12. Run Length Encoding Pseudocode initialize RunColor to 1 initialize RunLength to White for each pixel in the image if(pixel is the same as the RunColor) increment RunLength else write RunLength change RunColor to pixel's intensity initialize RunLength to 1 write last RunLength

13. Run Length Encoding Flowchart initialize RunColor to 1 initialize RunLength to White for each pixel in the image if(pixel is the same as the RunColor) increment RunLength else write RunLength change RunColor to pixel's intensity initialize RunLength to 1 write last RunLength Pseudocode

14. LZW compression algorithm Pseudocode set w = “” loop read a character k if wk exists in the dictionary w = wk else output the code for w add wk to the dictionary w = k endloop

15. LZW compression algorithm Flowchart set w = “” loop read a character k if wk exists in the dictionary w = wk else output the code for w add wk to the dictionary w = k endloop Pseudocode

16. Other good stuff  Group/ungroup: select multiple shapes holding the shift key down Group shapes: Selected shapes move as a unit

17. good stuff  Many automatic layout features  Export options under save as:.vsd.html.gif,.jpg,.png.wmf

18. Hyperlinks  If your flow chart gets too big, you can extend it on several pages. 1. Create the page or document you want to link to. 2. Select the shape you want to link from. 3. In the Insert menu, select Hyperlink (or use the shortcut Ctrl+K.) 4. You can have several links from the same shape. 5. To link to another page in the same flowchart document, browse in the Sub-address box, and select the page. 6. To link to an external document, browse in the Address box. 7. Click OK when you have added all the hyperlinks you need.  Access the links by right-clicking the shape to select a link.  If you create an html document from the flowchart, you will be able to click on the shape to access the link.