3. Systems Implementation
Implement the
security measures
as designed.
4. Systems Operation, Evaluation, and
Control
Operate the system
and assess its
effectiveness and
efficiency. Make
changes as
circumstances
require.
C. Analyzing Vulnerabilities and Th
Review of Lecture 5
Looked at Fortran commands in more detail
Control through if and do statements.
Logical expressions in Fortran .eq. .ne. .gt. .ge.
.lt. .le.
Logical expressions .not. .and. .or.
Looping with do j = start, end, inc and do while
con
Review and todays lecture
So far we have covered most of the features of Fortran 77
although there are still a number of structures and methods that
we have not explored.
It is important to remember that there is nearly always multiple
ways, all valid,
Mathematica
History
Developed between 1986-1988 at Wolfram Research
Mathematica 1.0 released in 1988
Mathematica 2.0 released in 1991
Mathematica 3.0 released in 1996 (typesetting)
Mathematica 4.0 released in 1999 (performance)
Mathematica 5.0 rele
12.010 Computational Methods of
Scientific Programming
Lecturers
Thomas A Herring
Chris Hill
Review of Lecture 2
Examined computer hardware
Computer basics and the main features of programs
Program design: Consider the case of calculating the
area of a
6.851 Advanced Data Structures (Spring12)
Prof. Erik Demaine
Problem 8
Sample solution
Signature compression. We will rst multiply the input word x by an integer m which will
arrange h1 , h2 , , hk into a lg2 n bit segment, then shift this segment to the
Problem M20
A 45 strain gauge rosette attached to the surface of an aluminum alloy wing skin
panel measures the following strains:
ea = -0.0025, eb =0.0020, ec=-0.0040
The orientation of the gauges is shown below
a
b
c
a) What are the extensional stresses
Summary
Finished up C with structures and memory management
Started with C+
C+ is C with the addition of classes
Class is a formal way to think about good program design.
Modularity, encapsulation, hierarchy, abstraction
A class has
Methods ( progr
Summary
LAST LECTURE
Basic C
Syntax v. Fortran
THIS LECTURE
Examined C-pointers
File Input/Output and the routines for formatted reads and
writes
Compiling C routines
The C preprocessor cpp.
Structures in C
Memory management
10/06/2011
12.010 Le
In UNIX, What is a special file? (5 points) What is the major advantage of having them?
(5 points)
A special file is not a file but a device that has a name obeying UNIX pathname
conventions for files, like "/dev/tty," and can be accessed through normal f
Review of last lecture
Start examining the FORTRAN language
Development of the language
Philosophy of language: Why is FORTRAN still used
(other than you cant teach an old dog new tricks)
Basic structure of its commands
Communications inside a progra
C History and Background
Origins 1973, Bell Labs
Public K&R C The C Programming Language, [Kernighan 1978]
ANSI C standardized 1989, X3.159-1989
Ritchie C is quirky, flawed and an enormous success
http:/cm.bell-labs.com/cm/cs/who/dmr/chist.html
Compiled
Introduction
anguages to e co ered
ortran Matla Mathematica C C
P thon and
graphics and ad anced parallel and P
computing topics
Specific ersions
S ortran
ith ortran 0 differences
Matla
elease 2011a
S C and C
Mathematica ersion .0.1
S
merican ational Stan
Review of Lecture 4
Looked at Fortran commands in more detail
Looked at variables and constants
IO commands:
Open/Close
Read/Write
Format
Started looking at character strings
09/22/2011
12.010 Lec 05
2
Todays Class
More Fortran Details
Character
18.415/6.854 Advanced Algorithms
Problem Set Solution 4
Lecturer: Michel X. Goemans
1. In class, we have seen Klein's cycle cancelling algorithm for the Min Cost Circulation Problem (MCCP). This algorithm requires O(mCU) iterations in the worst
case, i.e.
Summary
Today we finish up C and start C+
Final C topics
Structures: A method for grouping like variables
together
Memory management
Start of C+
History
Ideas of classes and objects
Examples to demonstrate concepts
10/11/2011
12.010 Lec 10
2
Struc
Review Lecture 01
Language characteristics:
Compiled versus interactive
Numeric versus symbolic
Algorithm development
Statement of problem
Algorithm design
Algorithm implementation
Verification
9/13/2011
12.010 Lec 02
2
Todays Lecture
Interface t