CS156: Intro to C, Part I

• Syllabus
• Practice makes perfect
• Discuss HW0
• CPL / BCPL / B / C
• Java totally rulez—why learn an old language?
• Standard C—says who?
  -or-
  “It works on my computer!”
• c99 -Wall -Wextra -pedantic

What is a program?

• Intro
• Programming Model
• Programming Elements
• First Program
• Compiling
• Lesson 1
• Self-check quiz

Practice Problems

// Halley’s Comment

• Tomorrow is the last drop day
• Homework must compile!
• More Introduction
• man 3 printf
• Variables, Statements and More
• Arithmetic
• Input & Output
• Buffering

• Variables, Expressions, I/O
• One Declaration

• Data types
• Declaration of Vars
• Variable names
• Math
• Assignment Operators
• Input/Output

Practice Problems

If it weren’t for C, we’d all be programming in BASI, OBOL, and Pasal.

• Discuss HW1
• Bases, numbers, problems in C
• Control Structures: if, switch
• Control Structures are a lot like decision flow charts.

• Expressions
• If statements
• Boolean Expressions in if
• More if statements
• Self-check quiz
• Switch Only bottom part of page

HW0 due Sunday noon

Practice Problems

There are 10 types of people in this world: those who understand binary and those who don’t.

• Finish if, else, and switch

HW1 due Tuesday noon; late Wednesday noon

One of the main causes of the fall of the Roman Empire was that, lacking zero, they had no way to indicate successful termination of their C programs.

• Review HW1
• Quiz #1
• Loops

• Incrementing
• Loops

• Loops
• while loop
• for loop

Loops Practice Problems

FoxTrot

• C99: mixed declarations & code
• Discuss HW2
• Finish Loops
• Start functions

• Variable Scope
• Functions
• Recursion
• Arguments by Reference

• Overview
• Function Intro
• Functions
• Good Functions
• Func
• Self-check quiz

Functions Practice Problems
Self-Quiz

C is quirky, flawed, and an enormous success.
-Dennis Ritchie

• Finish Functions

C Reference Card

HW2 due Tuesday noon; late Wednesday noon

A programmer tells a colleague his wife just had a baby.
“Is it a boy or a girl?”
“Yes.”

• Today is the last withdraw day
• Review HW2
• Quiz #2
• Recursive Functions
• How to program
• Arrays

• How to Program
• Arrays

• Constants
• Arrays
• Arrays
• Declaration
• Initialization
• More Arrays
• Examples

Practice Problems: Arrays More arrays Self-Quiz

Should array indices start at 0 or 1?
My compromise of 0.5 was rejected without, I thought, proper consideration.

• Discuss HW3
• Finish arrays
• Don’t use sizeof on an array parameter.

Practice Problems: Strings (answers)

As soon as we started programming, we found to our surprise that it wasn’t as easy to get programs right as we had thought. Debugging had to be discovered. I can remember the exact instant when I realized that a large part of my life from then on was going to be spent in finding mistakes in my own programs.

Maurice Wilkes discovers debugging, 1949

Spring Break!

• Strings

• Strings
• More Strings

• Intro 2 3
• Intro
• Strings
• Strings
• Strings and fgets

HW3 due Tuesday noon; late Wednesday noon

Practice Problems: File I/O (answers)
These two strings walk into a bar and sit down.
The bartender says, “So what’ll it be?”
''The first string says, “I think I’ll have a beer quag fulk boorg jdk^CjfdLk jk3s d#f67hw%^U r89nvy~~owmc63^Dz x.xvcu”
“Please excuse my friend,” the second string says, “He isn’t null-terminated.”''

• Review HW3
• Quiz #3
• Finish Strings

If the odds are a billion-to-one against something happening, it’ll happen several times per second, on today’s computers.
-Bret McKee

• File I/O
• Discuss HW4
• i=--i; and a=b++ * b++;
• Program Development using Morse Code:
  • Requirements
  • 1 2 3 4 5

File I/O

• Intro
• Overview
• Files
• 1 2 3 4
• Opening
• Streams
• Closing
• Example
• Self-Quiz

No, syntax isn’t a tax on booze and cigarettes.

• More file I/O

• Review HW4
• Review for exam
• Course evaluation

• Final Exam
  Photo ID required
  Questions will come from (or be based on) the quizzes, the practice problems, and your homework.