Transcript Variables - University of Texas at El Paso

EE2372
Software Design with Flowcharts
Dr. Jose Gerardo Rosiles
Spring 2010
TTh 10:30-11:50 am
Flowcharts
– Algorithm: A sequence or series of steps followed
to solve a problem or to implement a solution to
this problem.
– A flowchart is a means of visually presenting the
flow or steps taken to implement a computer
program.
– Flowcharts can be used to visualize algorithms.
Flowcharts
•Graphical elements used to build
flowcharts
1. Start and end program
1. Processing steps
1. Input/Output operations
1. Decision making and branching
1. Connector
1. Flow lines
Flowcharts
• How to link components
1
<0
START
DO
SOMETHING
INPUT
VALUE
NO
DO
SOMETHING
DECIDE
YES
1
END
>0
DECIDE
==0
OUTPUT
VALUE
1
Flowcharting Examples
• Some examples taken from
http://www.nos.org/htm/basic2.htm
• See class handout for more details
Example 1
Draw a flowchart to find the sum
of the first 50 natural numbers.
Example 2
• Draw a flowchart to find the largest of three numbers A,B, and C.
• Do on your own, then look at solution.
• Find an error in the following possible solution
Example 3
• Draw a flowchart for computing factorial N (N!) where
N! = 1  2  3  …… N .
Example 4
• A company’s salesmen are selling toothpaste and tooth powder.
The company having 50 salesmen gives 10% commission on the sale
of toothpaste and 20% commission on tooth powder.
• Draw a flowchart to compute and print the total sale and the total
commission for each salesman.
Note:
S = Salesman number
P1 = Amount of sales of paste
P2 = Amount of sales of powder
K = Counter for the number of salesman
Example 5
• Modify the flowchart in Example 4 to print the following
heading.
Salesman No
Total Sale
Total commission
Under these heading, write the values of these variables for
the 50 salesmen. At the end, the totals of the entire sale
and the entire commission should also be printed out.
• Hint, use variables:
TS = Total sales
TC = Total commission
Example 6
• Implement a flowchart to compute
Example 7
• How do hand calculators implement trigonometric functions?
• Use approximations by Taylor series (thanks to Wikipedia for
the math LaTex expressions).
• Draw flowcharts to approximate cosine and sine up to N
terms.
• Assume you have access to power and factorial functions.