comp sci info

CSP2104-5107: Object-Oriented
Programming in C++
Lecture 03
Making Decisions
Prof. A. Taleb-Bendiab
Room 13.213
[e-mail]
Blackboard

Prof. A. Taleb-Bendiab, Unit: Object-Oriented Programming in C++, Code: CSP2104-5107, Lecture: 03, Date: 05/03/2013, Page: 1

Unit Review: Module 03
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So far …
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This Lecture
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Lecture 1: Introduction to OO
Lecture 2: Evaluating C++ Expressions
Use the if and if-else statements
Use nested if statements
Avoid common pitfalls with if statements
Use the switch statement
Use the conditional operator
Use the logical AND and the logical OR
Make decisions with structure fields

Book:
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Object-Oriented Programming Using C++, Fourth Edition

Prof. A. Taleb-Bendiab, Unit: Object-Oriented Programming in C++, Code: CSP2104-5107, Lecture: 03, Date: 05/03/2013, Page: 2

Using the if Statement #1
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C++ supports all standard control structures:

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if statement if-else statement switch statement

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Conditional operators

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You can combine decisions using the logical AND and OR operators
The Single-Alternative if
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if: primary C++ selection structure statement used to perform a single-alternative selection
Syntax:
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if (Boolean expression)
 {action if true}
 else { expression};

Prof. A. Taleb-Bendiab, Unit: Object-Oriented Programming in C++, Code: CSP2104-5107, Lecture: 03, Date: 05/03/2013, Page: 3

Using the if Statement #2

Prof. A. Taleb-Bendiab, Unit: Object-Oriented Programming in C++, Code: CSP2104-5107, Lecture: 03, Date: 05/03/2013, Page: 4

The Single-Alternative if #3
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Note the difference between the following
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Example 1:

Execute as

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Example 2:

Execute as

Prof. A. Taleb-Bendiab, Unit: Object-Oriented Programming in C++, Code: CSP2104-5107, Lecture: 03, Date: 05/03/2013, Page: 5

The Dual-Alternative if
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if-else structure
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Syntax
if