Schaum's Outline Series

142
1. A person tries to turn the door handles. Environment Visible
2. The door is unlocked by the system. System Visible
3. An employee lets a nonemployee through the door. Environment Hidden
4. An employee has an identical twin. Environment Hidden
5. An image has the minimal number of similarities for the matching algorithm. System
Hidden
Answers to Problems
1. Draw scenarios for the interaction between a customer trying to buy a particular music
CD with cash and a clerk in the music store. Be sure to cover all possibilities. Use the
state machine model with the events being the arcs.
See Fig. 9-9.
Customer
enters store
Customer
doesn’t
find CD
Customer
leaves store
2. Calculate Bieman and Ott’s functional cohesion metrics for the following code segment.
Draw a directed graph and show the flows.
cin >> a >> b;
int x,y,z;
x=0; y=1; z=1;
while (a > 0){
x=x+b;
z=z*b;
if (a > b){
y=y*a;
}
a=a-1;
}
cout