1. CSCI 3328 Object Oriented Programming in C# Chapter 4: C# Control Statement – Part I – Exercises
UTPA – Fall 2012
This set of slides is revised from lecture slides of Prof. John Abraham. -- Xiang Lian

2. Objectives In this chapter, you will do some exercises about:
basic control structures in Visual C#

3. Precedence of Operators
. new ++ (postfix) -- (postfix)
(unary)
* / %
+ -
< <= > >=
== !=
? :
= += -= *= /= %=
high
low

4. Multiple Choices
Which of the following is not an attribute of an airplane?
A. length B. wingspan C. fly D. number of seats
All applications can be written in terms of three types of control structures except for:
A. sequence B. selection C. random D. repetition
The ________ statement is used to execute one action when a condition is true and another when that condition is false.
A. repetition B. selection C. inheritance D. conditional
Repeating a set of instructions a specific number of times is called _______ repetition.
A. EOF-controlled B. flag-controlled C. counter-controlled D. sentinel-controlled
When it is not known in advance how many times a set of instructions will be repeated, a(n) ________ value cannot be used to terminate the repetition.
A. flag B. signal C. counter D. sentinel

5. Multiple Choices (cont'd)
The _______ structure is built into C# -- by default, statements execute in the order they appear
A. sequence B. selection C. repetition D. goto
Instance variables of type int are given the value ______ by default.
A B. NULL C. "" D. 1
C# is a ___________ language – it requires all variables to have a type.
A. strongly-typed B. weak-typed C. wield-typed D. object-typed
If the increment operator is _____ to a variable, the variable is incremented by 1 first, then its new value is used in the expression
A. prefixed B. postfixed C. infixed D. None of the above
The expression to the right of an assignment operator (=) is evaluated ______the assignment occurs.
A. before B. after C. at the same time D. none of the above

6. True/False Statements
An algorithm is a procedure for solving a problem in terms of the actions to execute and the order in which these actions execute.
A set of statements contained within a pair of parentheses is called a block.
A selection statement specifies that an action is to be repeated while some condition remains true.
A nested control statement appears in the body of another control statement.

7. True/False Statements (cont'd)
C# provides the arithmetic compound assignment operators +=, -=, *=, /=, and %= for abbreviating assignment expressions.
Specifying the order in which statements (actions) execute in an application is called program control.
The unary cast operator (double) creates a temporary integer copy of its operand.
Instance variables of type bool are given the value true by default
Pseudo code helps you think out an application before attempting to write it in a programming language.

8. What are the Precedence of Operators in Expressions?
15*3%12+45/(9%2)*-2
Product *= x++;

9. Debug Errors public static main(string []args) { Int x=0; x=y;
WriteLine(x); }

10. Debug Errors (cont'd) public static main(string []args) {
if (gender = 1)
Console.WriteLine("Woman");
else;
Console.WriteLine("Man"); }

11. Debug Errors (cont'd) public static main(string []args) {
int counter = 0;
While (counter > 10)
Console.WriteLine(counter);
return; }

12. Programming
Write 4 different C# statements that each add 1 to int variable x.

13. Programming (cont'd)
Write a console program using nested while loop to output the following pattern to screen: * **
***
****
*****