1. The University of Texas – Pan American
CSCI 3328 Object Oriented Programming in C# Chapter 6: Methods – Exercises
Xiang Lian
The University of Texas – Pan American
Edinburg, TX 78539
This set of slides is revised from lecture slides of Prof. John Abraham. -- Xiang Lian

2. Multiple Choices A method is invoked with a(n) __________.
A. method call B. method declaration C. class declaration D. class call
A variable known only within the method in which it is declared is called a(n)__________.
A. global variable B. local variable C. random variable D. private variable
The statement of _______ in a called method can be used to pass the value of an expression back to the calling method.
A. assigning value to parameters passing by values
B. break C. return D. continue
The keyword ________ indicates that a method does not return a value.
A. return B. public C. private D. void
Data can be added to or removed from the ______ of a stack.
A. bottom B. top C. middle D. random position

3. Multiple Choices (cont'd)
An object of class ______ produces pseudorandom numbers.
A. Math B. randomNum C. Random D. randomNumber
Assuming randomNumbers is an object for generating pseudorandom numbers, which of the following statements generates a random number between 1 and 4 (inclusive)?
A. randomNumbers.Next(4)+1;
B. randomNumbers.Next(0, 5);
C. randomNumbers.Next(1, 4);
D. randomNumbers.Next();
A method that calls itself either directly or indirectly is a(n) __________method.
A. static B. dynamic C. public D. recursive

4. True/False Statements
The following two methods can exist in the same class:
void Method1(int x, float y);
int Method1(int x, float y);
If we want to use the constant p, we can write Math.pi in the C# program.
It holds that method Math.Floor(4.5) returns value 4.
It holds that method Math.Ceiling(4.0) returns value 4.

5. Debugging Errors
int G() { Console.WriteLine("Inside method G"); void H() Console.WriteLine("Inside method H"); }

6. Debugging Errors (cont'd)
void F(float a) { float a; Console.WriteLine(a); return a; } int G(int x) return x*G(x-1);

7. Write a Program
Write a method in C# to return the larger value of two decimal numbers.
Write another program in C# to return the largest value among 3 decimal numbers, by invoking the method above.

8. Write a Program (cont'd)
Write a recursive method in C# to compute the Fibonacci number:
1, 1, 2, 3, 5, 8, 13, 21, 34, ....
Given the first two numbers of the sequence (say, a1 and a2)
n-th number an, n >= 3, of this sequence is given by: an = an-1 + an-2