1. Introduction to C Programming
ET2560 Introduction to C Programming
Introduction to C Programming
Unit 1, Part 2
Unit 1 Presentations

2. Flowchart Elements
Unit 1: Algorithms

3. Begin and End Shapes
These shapes are used to begin and end a flowchart
The beginning shape has the algorithm name as its label
The end shape contains the word “End”

4. Rectangle Shape – Actions
Rectangle has one entry and one exit
The text in the rectangle is pseudo-code corresponding to one step in the algorithm

5. Diamond Shape – Decision Point
One entry, two exits (one for “yes”, the other for “no”)
Contains one question, with yes/no answer

6. Selection Shape Selection is an extension of the decision point
Instead of a question, the diamond contains a value
The value selects which branch to take
One “other” branch is used for all other values that don’t have a branch

7. Connector Shape – On-page
Use for a connection on same page
Shape shows connection from one point to another
Left shape can be used multiple times
Right shape, used once, shows the destination of connection

8. Connector Shape – Off-page
Use for a flowchart larger than one page
Shape shows connection from one page to another
Left shape can be used multiple times
Right shape, used once, shows the destination of connection
Visio automatically creates a new page when this shape used

9. Shapes Combine to Create Structures
Straight-line structure
Single-sided branch
Double-sided branch
Selection structure
Until loop
While loop
Do-while loop

10. Straight-line Structure

11. Single-sided Branch

12. Double-sided Branch

13. Selection Structure Selection structure is an extension of the branch
All branches must converge together at the end

14. “Do-While” Loop

15. “While” Loop

16. “Until” Loop

17. Flowchart Examples
Unit 1: Algorithms

18. Flowchart Example – Count to 9
Here is an algorithm, in pseudo code, to output 1-9:
Output “List of Numbers less than 10”
Put 1 in number
Output number
Add 1 to number
If number is less than 10, go back to step 3
End

19. Flowchart Created from Algorithm

20. Flowchart Example – Odd #s < 10
Output “List of Odd Numbers less than 10”
Put 1 in number
If number divided by 2 has remainder 0, go to step 5
Output number
Add 1 to number
If number is less than 10, go back to step 3
End

21. Flowchart for Odd Numbers < 10