Today

1
Todays Class

• Introductions
• About the Course
• Fundamentals
• Computer
• Program - Sequence
• Parts of a computer
• Parts of a CPU
• Writing a really short program
• Homework

2
I love programming

• 20 year career, then went into something else
• My dad HATED programming
• My own kids never really tried it
• Some people will find they love it
• Some will hate it, and some are in the middle
• The GOAL to be capable at programming

3
Class Survey

• Who is sitting next to you?
• Their name? Major?
• Why are they taking the course?
• What computer skills do they bring to this class?

4
Class Schedule

• Ill arrive about 5 minutes early or so every day
• Lectures start at 955 AM, Tue/Thu
• Ends at 1135
• Lab starts at 1055 AM M-W-F
• Ends at Noon
• Both Lecture and Lab will usually start with a
  new technique

5
Syllabus

• Real syllabus tomorrow
• Learning C programming
• The basic mechanics
• Assignments and variables
• Conditionals
• Loops
• Input/Output
• Structure with multiple procedures
• Arrays
• Learning Matlab
• Many of the same concepts
• Built in features for mathematical problem
  solving
• Lots and lots of programming

6
Grading

• I do it by the numbers
• Its easy to earn an A-like grade do the work
• Its easy to flunk dont do the work
• In between grades if you skip homework or mess
  up on exams
• General outline of the grade
• Part goes to homework
• Part goes to exam (a similar weight)
• Part goes to final project
• Ill hand out grade sheets with your grade
• NO LATE WORK as a rule
• Need bona fide reason for late work

7
How the class works

• Memorization and programming
• This is lots and lots of detail work
• You work fast if you work from memory
• Practice and remember patterns that work
• Do the Reading!
• It gives you another source for programming
  details
• A different way of describing the same stuff
• A place to go to answer questions
• Some problem sets based on the reading
• Labs programming tasks to do
• Try to finish DURING lab
• If you dont, then you have extra homework

8
Fundamentals

• Computer
• Program - Sequence
• Parts of a computer
• Note they are built hierarchically
• Parts of a CPU

9
C Program

• Always in a file
• Always defines a function to perform
• Usually the function is named main
• We compile it to make it work

10
Sample C Program

• include ltstdio.hgt
• int main (void)
• printf("Hello, world\n")
• return 0

11
Observations

• Case sensitive match cases exactly
• Program is worked in order from start to end
• Sequences are fundamental to computing
• Curly braces mark nested components
• Hierarchies are fundamental to computing
• Learn the patterns of typical programming tasks
• Setting up the program
• Doing output

12
Compiling - the mechanics

• Command Line compiling
• Should work the same on PCs and Macs
• You have to compile programs to run them
• gcc hello.c
• You simply command the computer to run the
  program
• hello
• Hello, world!

13
Homework

• Read Chapters 1 through 3
• Find a C compiler on a computer you can use
• Already installed on 4th floor OSS
• May be installed on other campus computers
• You can download it and install it at home
• For PC use MinGW, thats whats installed here
• Write a program that prints your name
• Ideally, use your U drive or a USB drive
• Run it and see the result
• Print the C file. Include an explanation of
  where you compiled and ran it, and note any
  problems you had.

14
Whats happening next?

• A history of C
• Overview of Statements and Variables
• Simple types
• Printing out text
• The nuts and bolts of compiling programs

15
History of C

• Interpreting expressions (1940s)
• Sort/Merge Generator
• A2 Compiler
• Fortran
• Algol
• C

16
Statements and Variables

• Statements well use
• Function declarations like main
• Always followed by a pair of parentheses,
• and then curly braces
• Other statements are followed by a
• Variable declarations
• Assignment statements
• Variables
• Storage cells in your program
• Each one is like a spreadsheet cell,
• only dumber

17
Variable Naming

• Naming Structure
• First character A-Z, a-z, _ or
• Remaining same plus digits
• Style rules
• Descriptive names
• Usually start with lowercase letter
• Camelback use capitals to mark words
• itemsOrdered, totalPayment
• DO NOT USE to start a name

18
Types of variables

• First use you say the type
• int integer
• signed, no decimal part, less than 2G
• Examples
• int sampleInt 12
• sampleInt 25

19
Printing

• The printf() function
• Syntax of functions
• Takes 1 or more arguments or parameters
• First argument format string
• A string of characters to print
• Embedded signals to say what else to print (
  character)
• Each signal corresponds to a subsequent
  parameter
• Extra parameters
• One per format signal

20
Blanks, newlines, tabs

• Hello There
• Hello There
• \n, \t

21
Compiling and Running

• What is really happening?
• How a program executes
• Computer Languages
• Interpeting
• Compiling
• Running real instructions
• What it looks like in RAM

22
Creative Commons License

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