1. Flowcharts
Remember that a solution to a problem is called an algorithm.
Algorithms are often a series of steps required to solve the problem.
A flowchart is a graphical representation of an algorithm.
Each step in the algorithm is represented by a different symbol

3. Flowchart Symbols
Used to indicate a predefined or user-defined function is called

4. Sequential Structure Flowchart Example
Start
Sequential
Structure
Flowchart
Example
Input
NumOne
Input
NumTwo
Create a program that will allow the user to input 3 integers and have the sum calculated and outputted.
Input
NumThree
Calculate total
of 3 numbers
Output
the total
Stop

5. Flowchart Example #1 – while loop
Looping Structure
Flowchart Example #1 – while loop
Start
Create a program that will have the user input a name and have it outputted until the user wishes to finish.
While:
False
Stop
Input
continue?
True
Input a
name
Output a
name

6. Flowchart Example #2 - for loop
Looping Structure
Flowchart Example #2 - for loop
Start
Initialize
total to 0
Initialize
i to 0
Create a program that will allow the user to input 10 integers and have the sum calculated and outputted. Use a loop for this program.
If i=10
Increment i
Output
total
Yes
Input a
number No
Add number
to total
Stop

7. Selective Structure Flowchart #1 - Binary Selection Structure
Create a program that will allow the user to input their age. If they are over 16, output they can drive, otherwise output they can’t drive.
Start
Input age
if age >=16
Output
“Can’t”
False
True
Output
“Drive”
Stop

8. Selective Structure Flowchart #2 - Multiple Selection Structure
Create a program that will allow the user to input the number of widgets they sold. The program will output their level based on the following scale:
Over 500, they are in the “Gold Club”
Over 300, they are in the “Silver Club”
Over 100, they are in the “Bronze Club”
Not over 100, they are in the “Get a New Job Club”

9. Selection Structure (cont.)
Selective Structure
Flowchart #2 Multiple
Selection Structure (cont.)
Start
Input
sales
If sales >500
If sales >300
False
True
Output
“Gold”
Output
“Silver”
True
If sales>100
False
Stop
Output
“Bronze”
True
Output
“New Job”
False

10. Flowchart for a Program Using Predefined Functions
Start
Flowchart
for a Program
Using Predefined
Functions
Input a
string
Count
Characters
In string
Count
spaces
in string
Create a program that will allow the user to input a string of more than one word. It will calculate and output the average number of characters in the words.
Add 1
to number
of spaces
Calculate average
number of characters
in the words
Output
average number
of words
Stop

11. Flowchart Assignment Draw a flowchart for each of the
following problems
Sequential #4
Selective #1, #3, #6
Repetitive #1b, #3b, #7
Functions #5, #6
Files #2