Lecture #18: Review

November 12, 1999

Bob Pitha

bpitha@cs.ucsd.edu

http://www-cse.ucsd.edu/classes/fa99/cse5a

lectures

• Lecture 2: Computers and computer languages

– Basic terminology

– Computer numbering

• binary

• octal

• hexadecimal

– What is a computer program?

– Computer languages

• Lecture 3: How is programming like driving?

– That “driving directions” analogy

– Example program: “Hello, world!”

• Lecture 4: The C Language

– A second example program: printing numbers

• variables

• loops

– Introducing variables and data types

• identifiers/variable names

• why have data types?

• integer types

• Lecture 5: Data Types

– The 7 basic data types

– FtoC example program

• Lecture 6: More Data Types and Constants

– signed/unsigned data types

– constants

• numerical constants

• character constants (which are numbers, too!)

• escape sequences

• Lecture 7: Declarations

– variable declarations

– initialization

• Lecture 8: Operators

– operators and expressions

– expression concepts

• lvalues!!!

– conversions in expressions

– precedence and associativity

– arithmetic operators

• Lecture 9: More operators

– increment/decrement operators

– assignment operators

– relational operators

• Lecture 10: Operators, expressions, statements

– equality operators

– logical operators

– expressions

– statements

• expression statements

• compound statements

• Lecture 11: Statements 2

– selection statements: if-else

• Lecture 12: Statements 3

– the conditional expression

– selection statements: switch

– iteration statements (loops)

• while

• for

• Lecture 13: Statements 4

– iteration statements

• do-while

– jump statements: break and continue

• Lecture 14: Writing Programs

– interpreting a program

• multiplication table example

– writing a program

• printing prime numbers

• Lecture 15: Quiz answers and discussion

• Lecture 16: Functions 1

• Lecture 17: Functions 2

textbook sections

• Chapter 1: A Tutorial Introduction

– this isn’t necessary, but it does give some decent examples.

• Chapter 2: Types, Operators, and Expressions

– we’ve covered basically everything except the bitwise operators (§2.9)

– don’t worry about subjects we haven’t addressed in class:

• §2.3: strings and enumeration constants

• §2.4: const declarations

• Chapter 3: Control Flow

– we’ve covered the whole chapter

– it contains valuable information and examples

• they use getchar()

– §3.8 Goto and Labels

• this isn’t critical material, but it’s good to know

• Chapter 4: Functions and Program Structure

– §4.1 – 4.4

– §4.2 uses arrays in its example

exercises

• Consider trying the exercises in your text, especially:

– Chapter 1

• 1-1 – 1-5

– Chapter 2

• 2-2, 2-10

– Chapter 3

• 3-1

review questions

• These questions are just to help you review:

– What does the line #include <stdio.h> do for us?

– Why do we use comments?

– What are the largest and smallest values that can reliably be stored in a:

• char

• int

– What is the difference between the constants 6 and ‘6’?

– What are the two different kinds of division that the / operator can do? Under what circumstances does it perform each of them?

– Name at least two different uses for the semicolon in C

– what would the equivalent code, using a while loop, be for this example:

– What is the numeric value of the expression 3<4?

– Under what conditions will this code print “water”?

– What would this code print?

– What would this code print?(Caution: trick question!)

– What do these loops print?

– What is the difference between a function declaration (prototype) and a function definition?

– What is the difference between the prefix and postfix forms of the ++ operator?

– (trick question) What would the expression

do?

– Write a program to print the numbers from 1 to 10 and their squares, like this:

You should use a function to compute the squares of the numbers. It might have the following declaration:

– Write a program that prints a triangle, like this (using loops, not just a bunch of printf statements!):

– Write a function that computes and returns the average of five numbers, which are passed in as arguments. The function should be declared like this:

– Write a program that prints the numbers between 1 and 10, along with an indication of whether each is even or odd (you can use the % operator). Your output should look like this: