CS 1428 Exam I Review

Exam Format 90 Total Points All point totals are approximations 40 Points Writing Programs 25 Points Tracing Algorithms and determining results 10 Points Short Answer 20 Points Fill in the Blank All point totals are approximations Similar to programming assignments and programs from lecture

Example Programming Problem Write a program that reads a number of golf scores followed by that number of scores from a file named “scores.txt” Total the scores as you read them in and print out the average score to the screen. (Note: This problem is more difficult than the problems on the exam.)

Example Tracing Problem What will the EXACT output of the following program be? int foo = 9; string str = "Hey!"; float foo2 = 5.7; foo2 = foo - foo2; if (foo > foo2) cout << "Hello!"; else if (foo < foo2) cout << foo2; else cout << foo; cout << endl; cout << "foo2 is: " << foo2 << endl;

Example Short Answer Why is it a bad idea to compare two floating point numbers (e.g. doubles) with the equals (==) operator?

Chapter 1 0 points Types of errors Terminology Bits, bytes kilo, mega, giga, tera What do they mean? Machine language, assembly language, high- level language Von Neumann architecture Problem solving process Types of errors Important stuff, but not covered on the exam

Chapter 2 50 Points Variables and Identifiers Assignment Valid identifiers Data types Integer types Floating Point types Characters Boolean Assignment Arithmetic Operators Make sure you understand the mod(%) function

Chapter 3 30 Points cin Mathematical expressions static_cast Constants With prompts Mathematical expressions Order of precedence Combined operators (e.g. += and ++) static_cast Constants Mixed mode operations (mixing floats and ints) File input and output

Chapter 4 25 Points Relational operators Truth tables if statements Logical operators && || ! if statements if-else if-else-if

Functions 15 Points Know how to write a function Header (signature) Parameters Return statement Know how to call a function Know how to use the return value

Loops 10 Points Understand the “for” loop Initialize, conditional, update Body of the loop Review the programs that use loops

How to Study Rewrite all the programs. Redo labs. Learn by doing and recognizing patterns. Don’t stay up late!! Get some sleep and eat a good breakfast.

What to bring Pencils and erasers We will provide scratch paper No calculators

Questions