Transcript ECE Application Programming

16.216
ECE Application Programming
Instructor: Dr. Michael Geiger
Spring 2015
Lecture 1:
Course overview
Basic C program structure
Lecture outline
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Announcements/notes
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Program 1 due Monday, 1/26
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40 points: complete simple C program
10 points: introduce yourself (preferably at my office)
Today’s lecture
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Course overview
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Introduction to C programming
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7/17/2015
Instructor information
Course materials
Course policies
Resources
Course outline
Program development cycle
Basic program structure
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Course staff & meeting times
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Lectures:
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MWF 8-8:50, Ball 314
Instructor: Dr. Michael Geiger
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E-mail: [email protected]
Phone: 978-934-3618 (x43618 on campus)
Office: 118A Perry Hall
Office hours: M 10-11:30, W 10-11:30, Th 5-6
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Student questions are top priority during these hours
Also available by appointment at other times
May not be available regularly at start of term, but I plan
to be on campus more as semester goes on. Will
announce additional times as they become available.
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Course materials
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Textbook: K.N. King, C Programming: A
Modern Approach, 2nd edition, 2008, W.W.
Norton.
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ISBN: 978-0-393-97950-3
Course tools: Need integrated development
environment (IDE) that compiles/runs C code
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Recommended IDEs (all free; links on web)
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Windows: Microsoft Visual Studio Express (MS website)
Mac: Xcode (Mac App Store)
Linux: gcc/gdb (text-based; can run through terminal on
Mac as well)
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Additional course materials
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Course websites:
http://mgeiger.eng.uml.edu/16216/sp15/index.htm
http://mgeiger.eng.uml.edu/16216/sp15/schedule.htm
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Will contain lecture slides, handouts, assignments
Discussion group through piazza.com:
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Allow common questions to be answered for
everyone
All course announcements will be posted here
Will use as class mailing list—please enroll ASAP
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Course policies
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Prerequisite: 25.107 (Intro to Engineering), ECE
major
Academic honesty
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All assignments are to be done individually unless
explicitly specified otherwise by the instructor
Any copied solutions, whether from another student or
an outside source, are subject to penalty
You may discuss general topics or help one another
with specific errors, but do not share assignment
solutions
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Must acknowledge assistance from classmate in submission
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Programming assignments
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Will submit all code via e-mail to Dr. Geiger
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Penalty after due date: -(2n-1) points per day
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Will not get confirmation unless you explicitly ask
i.e., -1 after 1 day, -2 after 2 days, -4 after 3 days …
Assignments that are 8+ days late receive 0
See grading policies (last three pages of today’s
handout) for more details on:
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Grading rubric
Common deductions
Regrade policy
Example grading
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Programming assignments: regrades
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You are allowed one penalty-free resubmission per
assignment
Each regrade after the first: 1 day late penalty
Must resubmit by regrade deadline, or late
penalties will apply
Late penalty still applies if original submission late
“Original submission”  first file submitted
containing significant amount of relevant code
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In other words, don’t turn in a virtually empty file just
to avoid late penalties—it won’t count
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Grading and exam dates
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Grading breakdown
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Programming assignments: 60%
Exam 1: 10%
Exam 2: 15%
Exam 3: 15%
Exam dates
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Exam 1: Wednesday, February 18 in class
Exam 2: Wednesday, April 1 in class
Exam 3: TBD (during finals)
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Tentative course outline
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Basic C program structure and development
Working with data: data types, variables,
operators, expressions
Basic console input/output
Control flow
Functions: basic modular programming,
argument passing
Pointers, arrays, and strings
File & general input/output
Bitwise operators
Creating new data types: structures
Dynamic memory allocation
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Programming exercises
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Note on course schedule: several days
marked as “PE#”
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Those classes will contain supervised, in-class
programming exercises
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We’ll write/complete short programs to illustrate
previously covered concepts
If you have a laptop, bring it
May have to do some design ahead of time ...
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Course questions
General notes/questions about the course:
1. How many of you have prior programming
experience?
For those that do, can improve programming
style, efficiency, potentially learn new items
For those that don’t, course assumes no prior
programming experience
Fair warning for all of you: material builds on
itself throughout course
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Difficulty increases as course goes on
If (when) you get stuck, ask for help!!!
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Course questions (continued)
How many of you are taking this course only
because it’s required?
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Follow-up: how many of you hope you’ll never
have to program again once you’re done with the
course?
Both computer and electrical engineers commonly
program in industry—some examples:
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Automation of tasks
Circuit simulation
Test procedures
Programming skills highly sought by employers
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Program development
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... which is a good approach for your
assignments, too!
Average student’s approach to programming
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Read specification (assignment)
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Attempt to write complete program
Find output error and fix related code
Repeat previous step until either
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... at least some of it, anyway ...
Code completely works ...
... or code is such a mess that problem(s) can’t be fixed
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Program development (cont.)
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A more structured approach to program
development
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Read specification
Identify requirements
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Plan design that implements requirements
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What results should program produce?
How can I test correctness of those results?
Using flowchart, pseudocode, etc.
Plan for tests as well
Translate design into actual code
Test program and fix errors
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Our first C program
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
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Our first C program
# indicates pre-processor directive
include is the directive
stdio.h is the name of the file to "insert" into
our program. The <> means it is part of the C
development system
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
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Our first C program
main is the name of the primary (or main) procedure. All
ANSI C programs must have a main routine named main
The () indicates that main is the name of a procedure.
All procedure references must be followed with ()
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
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Our first C program
{ } enclose a "block". A block is zero or more C statements.
Note that code inside a block is typically indented for
readability—knowing what code is inside the current block is
quite useful.
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
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Our first C program
printf() is a "built-in" function (which is actually defined in
stdio.h).
"Hello World!" is the string to
print.
More formally, this is called the
control string or control specifier.
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
Every statement must end with a ";". Preprocessing
directives do not end with a ";" (but must end with a return).
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Our first C program
The \n is an escape character used by the printf
function; inserting this character in the control string causes
a “newline” to be printed—it’s as if you hit the “Enter” key
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
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Our first C program
The int tells the compiler our main() program will return
an integer to the operating system; the return tells what
integer value to return. This keyword could be void,
indicating that the program returns nothing to the OS.
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
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Final notes
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Next time:
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Data in C
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Data types
Constants
Variables
Reminders:
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Sign up for the course discussion group on
Piazza!
Program 1 due Monday, 1/26
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7/17/2015
40 points: complete simple C program
10 points: introduce yourself (preferably at my office)
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