Mathematical Operation

prepare a report which contains the C source code, the documentation and the flow charts, along with drawings explaining the mathematical background related to the calculation of-



insert

Code:

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F(x)= 5.x^2 + e ^(1/2.x) / 1/3.x^2+25.x+1.6

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in the range x ∑{A,B}




With a step of B-a/y, e.g. y= 1000.




The range, i i.e. a,b along with the step discretisation should be user defined. The results of the calculation should be stored in a file in the current directory which is also user defined.




in a second independent program, calculate the area (integral from a to b)

f (x).dx for the discrete value of an f(x) passed to the program through a user defined file located in the current directory. The output of the previous program




in a third independent program calculate f`(x)= dy/dx for all values provided the output file of the first prgram with the assumption that dy/dx= ∆y/∆x, ∆x→0

How would I do this? I have taken a c language class but have never did equatons or mathematical operations, also how do flow charts work?

Don't just copy & paste your assignment on here. Ask a specific question.

Most of the operators are what you'd find on a calculator, ie + (add), - (minus). Get a good book, it'll help. It seems you don't have to parse any math equations, so it all should be fairly straight forward (providing you have a good point of reference / book).

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F(x)= 5.x^2 + e ^(1/2.x) / 1/3.x^2+25.x+1.6

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What a hell is that! :S

that says that the function F(x) is equal to 5.x^2 + e ^(1/2.x) / 1/3.x^2+25.x+1.6 , the ^`s are used to show powers. e^(1.2.x) is exponent to the power of .5 times x. Do you understand now? I only know the basics of C, but am not sure whether a source code is correct or has errors. Can someone please help me with the source code?

Sounds like you did not satisfy all the prerequisites for your class, and it's come back to bite you. Happened to me once too, taking Calculus 3 without Calc 1 and 2 (I took business calculus by accident...I was going to school a night). I survived Physical Chemistry without Calc 3 just fine.

You need to either address this with your professor or withdraw from the class. It's the right thing to do.

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Can someone please help me with the source code?

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Where is it? May us help you?

insert

Code:

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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
main ()
{
double a,b,x;
printf("range[a,b]=");
scanf("%lf %lf",&a,&b);

printf("input [a,b]=(%lf %lf)\n",a,b)
if (a>b)
{
printf("error:a>b\n");
exit(1);
}
FILE *fd;
if((fd=fopen("sample.txt","w"))==NULL)
{
printf("cannot open file.\n");
}
x=a;
while(x<=b)
{
fprintf(fd,"%lf\t%lf\n",x,(3+exp(0.5*x))/0.3*x*X+25*x+1.6));
x=x+(b-a)/1000;
}
close(fd);
exit(0);
}

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This is the source code for the first problem, is it correct? how can i do the flow charts and documentation?

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This is the source code for the first problem, is it correct?

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Most certainly not, since it lacks proper formatting to make it readable. As to whether it works as expected... that should be tested by you.

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how can i do the flow charts and documentation?

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Do you need a soft copy of the flow charts and other drawings? If not, it would be pretty easy to sketch them out by hand.

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Originally Posted by madahmad1

This is the source code for the first problem, is it correct? how can i do the flow charts and documentation?

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It's your code, didn't you run it and see if it gives the right answer on several test sets of data?

You just post up code, but didn't test it! Brilliant! Absolutely *brilliant*!

Usually, you do flow charts by seating yourself, reviewing you class notes and text books on flow charts, and beginning the work. And let me emphasize the YOU DOING the WORK, part of it.

Ditto with your request for the program's documentation.

There is no big shortcut to learning how to program - *you* have to do a lot of work, plain and simple.

Can I get any of your emails to contact you guys? I do not have the program to test the code, thats the problem. Can anyone test it for me? I would really appreciate it.

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I do not have the program to test the code, thats the problem.

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That problem is easily solved. You can download compilers available at zero price online. For example, for Windows users, the MinGW port of gcc is packaged with the open source IDE Code::Blocks, and Microsoft's optimising compiler (for both C and C++) is available with the free Microsoft Visual C++ 2008 Express.

Can I get your email laserlight? I would like to contact you about something.Thanks for your help, I will try downloading these compilers.

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I would like to contact you about something.

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Pose your questions to the community here.

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Thanks for your help, I will try downloading these compilers.

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You're welcome :)

Can anyone here give me help outside of the message board? Just post your email address.

Why? What's wrong with posting the questions here?

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Can anyone here give me help outside of the message board? Just post your email address.

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You come to a forum community, ask a question, then hope to get someone's email address so you can receive private tuition for free? That's rude, and anyone who gives in to your demand is either stupid, really free, or malicious.

Just PM someone, don't ask for emails...

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Originally Posted by C_ntua

Just PM someone, don't ask for emails...

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Just not me! ;-)

--
Mats

Or me, which you already just did...

And me too.

C_ntua, you're going to pay dearly for your suggestion :devil:

Oh, and by the way, madahmad1: I will not do your homework for you, and no, your money is no temptation for me.

Oh crap, I've been PM'ed the same pleading as well.
/fetches mod stick.

can u give me exact links for what to download and how to use these programs? I have tried but do not know how. What am i supposed to download? thanks in advance for your help

any help?

What program should I download and install to see if my code executes in the compiler?

Laserlight has already linked you to a compiler

Reading over the thread it seems like you should really be seeking help from your professors or peers.

how should i get to the compiler to work? What file should i download? please give me links and tell me what to download

If anyone is willing to do my assignment, I will pay him. Send me a PM telling me how much you want. I am a mechanical engineer major and do not have a need for c language.

This is how we have idiots in industry that undeservedly have "Engineer" in their job title. Do the diligent workers in your class a favor and just fail the course. Take it again next semester and try to actually do the work that time.

Anybody willing to do them?

You are a cheat who does not deserve help, only scorn, or sympathy at best.

*thread closed*