COEN 79
Object-Oriented Programming and Advanced Data Structures
Assignment #1
COEN 79代写 1.(4 pts)Design a class for a point in polar-coordinates (r, theta), r, radius, is in cm and theta is in degrees with the following ···
1.(4 pts)
Design a class for a point in polar-coordinates (r, theta), r, radius, is in cm and theta is in degrees with the following member functions:
default constructor (0, 0)
getters: get_r and get_angle
setter: set_angle
please provide an example of a main function using
the polar coordinates.
2.(2 pts) COEN 79代写
What is the time complexity of fun(). Please show your proof.
int fun(int n)
{
int count = 0;
for (int i = n; i > 0; i /= 2)
for (int j = 0; j < i; j++)
count += 1;
return count;
}
3.(1 pt)
Give a concise formula that gives the approximate number of digits in a positive integer. The integer is written in base 10.
4.(2 pts) COEN 79代写
What are the differences between references and pointers?
5.(3 pts)
What are the three ways we can use items defined in a namespace. Include examples in your answer.
6.(2 pts) COEN 79代写
Discuss about the output of the following code. How the result will change if we replace struct with class?
1. struct Test {
2. int x;
3. };
4.
5. int main() {
6. Test t;
7. t.x = 20;
8. cout<t.x<endl;
9. return 0;
10. }
7.(2 pts) COEN 79代写
A The header of the point class is as follows:
1. class point
2. {
3. public:
4. // CONSTRUCTOR
5. point (double initial_x = 0.0, double initial_y = 0.0);
6.
7. // MODIFICATION MEMBER FUNCTIONS
8. void set_x (double& value);
9. void set_y (double& value);
10.
11. // CONST MEMBER FUNCTIONS
12. point operator+ (double& in) const;
13.
14. private:
15. double x; // x coordinate of this point
16. double y; // y coordinate of this point
17.
18. };
- Which line of the following code results in an error? Explain why.
- What’s the solution?
1. main() {
2. point myPoint1, myPoint2, myPoint3;
3. double shift = 8.5;
4. myPoint1 = shift + myPoint2;
5. myPoint3 = myPoint1.operator+ (shift);
6. myPoint1 = myPoint1 + shift;
7. }
8.(2 pts) COEN 79代写
What is the output of this code? Discuss your answer.
1. #include < iostream >
2. using namespace std;
3.
4. class CMyClass {
5. public:
6. static int m_i;
7. };
8.
9. int CMyClass::m_i = 0;
10.
11. CMyClass myObject1;
12. CMyClass myObject2;
13. CMyClass myObject3;
14.
15. int main() {
16. CMyClass::m_i = 2;
17. myObject1.m_i = 1;
18.
19. cout << myObject1.m_i << endl;
20. cout << myObject2.m_i << endl;
21.
22. myObject2.m_i = 3;
23. myObject3.m_i = 4;
24.
25. cout << myObject1.m_i << endl;
26. cout << myObject2.m_i << endl;
27. }
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