computer program

**Richard Bos** · Nov 2 '06, 10:45 AM

Re: computer program

"anuj" <anujkairati@gm ail.comwrote:

plz people help me in writing theses programs

plz st00dents do yr own homework L0L!!!11!

Richard

**mark_bluemel@pobox.com** · Nov 2 '06, 01:45 PM

Re: computer program

anuj wrote:

plz people help me in writing theses programs

You've phrased your request wrongly (apart from the obscenity of "plz"
and "theses").

What you meant was "please write these programs for me" - to which the
answer is "no". We don't offer a "do your homework for free" service.

If you do some work, make an attempt and post what you've written
together with a description of the problems you've encountered, we'll
help.

**osmium** · Nov 2 '06, 01:55 PM

Re: computer program

"anuj" wrote:

Write a computer program (in C or C++) that computes langrange
interpolation polynomials for the function f(x) = Cos(x) at 10 equally
spaced points of the interval [0,2].
>
Write a computer program (in C or C++) that reads n coefficients of
each of the n linear equations and solves these equations, using gauss
Elimination method and prints appropriate solution

Could you, given enough time, do this with pencil and paper and a scientific
calculator? If not, this is a math question, not a computer programming
question. Wikipedia is often a good starting point for questions such as
this.

Did you mean LaGrange? Spelling is important when dealing with computers,
they are very unforgiving. There are tons of hits on <lagrange
interpolationon Google.

**dcorbit@connx.com** · Nov 2 '06, 04:25 PM

Re: computer program

anuj wrote:

plz people help me in writing theses programs
>
Write a computer program (in C or C++) that computes langrange
interpolation polynomials for the function f(x) = Cos(x) at 10 equally
spaced points of the interval [0,2].

Def:

Lagrange Interpolating Polynomial -- from Wolfram MathWorld

http://mathworld.wolfram.com/LagrangeInterpolatingPolynomial.html

The Lagrange interpolating polynomial is the polynomial P(x) of degree

Do it this way:

Neville's Algorithm -- from Wolfram MathWorld

http://mathworld.wolfram.com/NevillesAlgorithm.html

Neville's algorithm is an interpolation algorithm which proceeds by first fitting a polynomial of degree 0 through the point (x_k,y_k) for k=1, ..., n, i.e., P_k(x)=y_k. A second iteration is then performed in which P_i and P_(i+1) are combined to fit through pairs of points, yielding P_(12), P_(23), .... The procedure is repeated, generating a "pyramid" of approximations until the final result is reached P_1; P_2; P_3; P_4P_(12); P_(23); P_(34)P_(123); P_(234)P_(1234). The final result is

Write a computer program (in C or C++) that reads n coefficients of
each of the n linear equations and solves these equations, using gauss
Elimination method and prints appropriate solution

Gaussian Elimination -- from Wolfram MathWorld

http://mathworld.wolfram.com/GaussianElimination.html

Gaussian elimination is a method for solving matrix equations of the form Ax=b. (1) To perform Gaussian elimination starting with the system of equations [a_(11) a_(12) ... a_(1k); a_(21) a_(22) ... a_(2k); | | ... |; a_(k1) a_(k2) ... a_(kk)][x_1; x_2; |; x_k]=[b_1; b_2; |; b_k], (2) compose the "augmented matrix equation" [a_(11) a_(12) ... a_(1k); a_(21) a_(22) ... a_(2k); | | ... |; a_(k1) a_(k2) ... a_(kk)|b_1; b_2; |; b_k][x_1; x_2; |; x_k]. (3) Here, the column...

The first exercise is trivial, and the second one is harder.

Once you have some code, show it to us and we will offer handy
suggestions.

**Lars Rune Nøstdal** · Nov 2 '06, 06:15 PM

Re: computer program

On Thu, 02 Nov 2006 11:02:47 +0000, Richard Bos wrote:

"anuj" <anujkairati@gm ail.comwrote:
>

>plz people help me in writing theses programs

>
plz st00dents do yr own homework L0L!!!11!
>
Richard

OMG .. OH NOOES!! WHAT EVER SHALL WE DOES NOW?! I NEED THIZ EDJUCÃ†ISHÃ…N
FÃ…R MAI FUTURE EMPLÃ…YMENT! PLZ GIVEZ IT TO ME -- PLEEEZ!

--
Lars Rune NÃ¸stdal

http://lars.nostdal.org/

**Christopher Benson-Manica** · Nov 2 '06, 10:25 PM

Re: computer program

Lars Rune N?stdal <larsnostdal@gm ail.comwrote:

OMG .. OH NOOES!! WHAT EVER SHALL WE DOES NOW?! I NEED THIZ EDJUC?ISH?N
F?R MAI FUTURE EMPL?YMENT! PLZ GIVEZ IT TO ME -- PLEEEZ!

S1f, f00! Mai d3gr33 R teh pr3ciousssss!!

(It's rather nice that programming is somewhat more difficult to cheat
at than, say, English. All those free essay sites should be
imprisoned for contributing to the delinquency of minors.)

--
C. Benson Manica | I *should* know what I'm talking about - if I
cbmanica(at)gma il.com | don't, I need to know. Flames welcome.

**dcorbit@connx.com** · Nov 2 '06, 10:45 PM

Re: computer program

Christopher Benson-Manica wrote:

Lars Rune N?stdal <larsnostdal@gm ail.comwrote:
>

OMG .. OH NOOES!! WHAT EVER SHALL WE DOES NOW?! I NEED THIZ EDJUC?ISH?N
F?R MAI FUTURE EMPL?YMENT! PLZ GIVEZ IT TO ME -- PLEEEZ!

>
S1f, f00! Mai d3gr33 R teh pr3ciousssss!!
>
(It's rather nice that programming is somewhat more difficult to cheat
at than, say, English. All those free essay sites should be
imprisoned for contributing to the delinquency of minors.)

A google search will turn up source code for both of his assignments
(and a few thousand hits each at least).

--
C. Benson Manica | I *should* know what I'm talking about - if I
cbmanica(at)gma il.com | don't, I need to know. Flames welcome.

**Christopher Benson-Manica** · Nov 2 '06, 10:45 PM

Re: computer program

dcorbit@connx.c om wrote:

A google search will turn up source code for both of his assignments
(and a few thousand hits each at least).

But it does require a bit of understanding to pick a program that
actually solves the problem; picking an essay that is at least *about*
King Lear is not too difficult.

--
C. Benson Manica | I *should* know what I'm talking about - if I
cbmanica(at)gma il.com | don't, I need to know. Flames welcome.

**dcorbit@connx.com** · Nov 3 '06, 12:25 AM

Re: computer program

Christopher Benson-Manica wrote:

dcorbit@connx.c om wrote:
>

A google search will turn up source code for both of his assignments
(and a few thousand hits each at least).

>
But it does require a bit of understanding to pick a program that
actually solves the problem; picking an essay that is at least *about*
King Lear is not too difficult.

Back in the day, we would trudge on down to the Academic Computer
Center and crack open TAOCP (Knuth) volume <1/2/3as needed, and
translate his algorithm from MIX into whatever we need, put in a
citation and turn it in. {I even wrote my own MIX emulator so that I
could be sure I had it right.} One has to wonder deeply if there has
ever been a computer science problem posed that has not already been
solved by Knuth back in the 1970's.

Which goes to show -- when you tell where you found it, it's research.
When you just snag it and turn it in, it's plagiarism.
;-)

--
C. Benson Manica | I *should* know what I'm talking about - if I
cbmanica(at)gma il.com | don't, I need to know. Flames welcome.

computer program

computer program

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