| 1 |
| h04 |
| CS16 S18 |
| Name: | ||||
|---|---|---|---|---|
| (as it would appear on official course roster) | ||||
| Umail address: | @umail.ucsb.edu | section |
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| Optional: name you wish to be called if different from name above. | ||||
| Optional: name of "homework buddy" (leaving this blank signifies "I worked alone" | ||||
h04: Chapter 4: Predefined and programmer defined functions
| ready? | assigned | due | points |
|---|---|---|---|
| true | Fri 04/20 09:00AM | Fri 04/27 11:59PM |
You may collaborate on this homework with AT MOST one person, an optional "homework buddy".
MAY ONLY BE TURNED IN IN THE LECTURE/LAB LISTED ABOVE AS THE DUE DATE,
OR IF APPLICABLE, SUBMITTED ON GRADESCOPE. There is NO MAKEUP for missed assignments;
in place of that, we drop the three lowest scores (if you have zeros, those are the three lowest scores.)
Please:
- No Staples.
- No Paperclips.
- No folded down corners.
Read Chapter 4, sections 4.1 - 4.3. Please note that while the book does not cover number representation, it is an important concept for this class. Questions 3 to are meant to give you more practice with number representation. These should be answered based on material presented in lectures 5 and 6. You don’t need to turn this homework in. To earn credit for this homework, complete the corresponding quiz on gauchospace AFTER you have completed the pen and pencil version of the homework. The quiz will be available one day before the due date indicated on the homework.
PLEASE MARK YOUR HOMEWORK CLEARLY, REGARDLESS OF IF YOU WRITE IT OUT IN INK OR PENCIL!
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1. (2 pts) What is a flag in a program and of what use is it?
2. (2 pts) What is type casting and how is it performed in C++?
3.(5 pts) Which of these uses of type casting will NOT ensure that f is 1.5? Answer should be (ex1), (ex2), (ex3), or (ex4) (or a combination of those).
int a(1), b(2), c(2), d(2), e(2);
double f;
f = (a + b)*c / static_cast<double>(d + e); // (ex1)
f = static_cast<double>(a + b)*c / (d + e); // (ex2)
f = (a + b)*static_cast<double>(c) / (d + e); // (ex3)
f = static_cast<double>((a + b)*(c) / (d + e)); // (ex4)
1 #include <iostream>
2 using namespace std;
3
4 bool isDivisibleBy(int a, int b);
5
6 int main() {
7 cout << "result for (15,5) is " << isDivisibleBy(5,15) << endl;
8 cout << "result for (15,5) is " << isDivisibleBy(5,15) << endl;
9 return 0;
10 }
11
12 bool isDivisibleBy(int a, int b) {
13 return ( a % b == 0 );
14 }