Comp Sci Ch 3 Ch 4

Question 1

What is a branch and when is it executed?

Answer 1

and if statement executed under a certain condition

Question 2

What is an if-else branch and when is it executed?

Answer 2

2 branches
if branch executed if true, then else is executed if false

Question 3

What is an if-else-if-else branch?

Answer 3

each branch is checked until one is found to be true

Question 4

In a conditional expression you use…

Answer 4

==, and relational operators

Question 5

What is a bool value?

Answer 5

True or False

Question 6

How are characters compared?

Answer 6

with their ASCII

Question 7

How are strings compared?

Answer 7

same number of characters and if their characters are identical

Question 8

What are the logical operators

Answer 8

&&, ||, !

Question 9

How to compare floating point numbers?

Answer 9

fabs (x-y) < .0001

Question 10

What is epsilon?

Answer 10

the difference threshold that floating point numbers are equal

Question 11

How do you get a random number?

Answer 11

rand()

Question 12

What needs to be enabled to use rand()

Answer 12

(#) include < cstdlib >

Question 13

How do you get a specific range of random numbers?

Answer 13

rand() % (largest-smallest +1) + smallest

Question 14

How do you determine number values in range of randomization coputation

Answer 14

large-small +1

Question 15

What is pseudo?

Answer 15

not actually but having the appearance of

Question 16

How is the sequence determined?

Answer 16

seed

Question 17

How do you get a different/make a different seed?

Answer 17

srand(#), CALLED ONCE ONLY

Question 18

How do you get a truly random sequence each time?

Answer 18

srand(time(0));

Question 19

What needs to be enabled to use time (0)?

Answer 19

(#) include < ctime>

Question 20

What is a do-while loop?

Answer 20

running the body at least once then checking if run again
- do then check
do {
}while (expression);

Question 21

What is a loop?

Answer 21

repeatedly executes body while expression is true

Question 22

What is an iteration?

Answer 22

each time a loop’s statements execute

Question 23

What is a while loop?

Answer 23

checks to run
check, and run if expression is true
while (expression) {
}

Question 24

What is a sentinel loop?

Answer 24

loop that keeps going until a value stops it

Question 25

What is a sentinel value?

Answer 25

a special value indicating the end of a list

Question 26

When trying to find a range, do you always need the plus one?

Answer 26

add the plus one when the large number is included

Question 27

What is the order of evaluation?

Answer 27

P ! M R E L
parentheses
not
math
relational
equality
logical