Urgent Tutorial HELP!!!!

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September 27th, 2005, 11:06 PM

bigdaddy

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Urgent Tutorial HELP!!!!

thanx everyone...there are a lot of programming experts down here

September 27th, 2005, 11:16 PM

Geo.Garnett

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Ok, first off how urgent is this, like is it due tomorrow? Second off let me see if I got this right. You need to read the data from a text file and have the program calculate the test results and display them or do you need to out put a seperate file for the results?

September 28th, 2005, 03:57 AM

Itsacon

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Something like this?

c Code:

Original - c Code

#include <stdio.h>
#include <math.h>
#define PI 3.14159265
 
int main(void)
{
    FILE *fp;
    int i, j, substances, experiments, inval, outval, maxsub;
    double tempval, sumval, maxval;
    
    fp = fopen("refraction1.txt", "r");
 
    fscanf(fp, "%d\n", &substances);
 
    for(i = 0, maxval = 0.0; i < substances; i++)
    {
        printf("Substance No.%d\n", (i+1));
        fscanf(fp, "%d\n", &experiments);
        for(j = 0, sumval = 0.0; j < experiments; j++, sumval += tempval)
        {
            fscanf(fp, "%d %d\n", &inval, &outval);
            tempval = sin(((double) inval) * PI / 180) / sin(((double) outval) * PI / 180);
            printf("Data No.%d Angles(in:%d, out:%d) Rindex = %.2f\n", (j+1), inval, outval, tempval);
        }
        tempval = (sumval / experiments);
        printf("Average Rindex = %.2f\n\n", tempval);
        if(tempval > maxval)
        {
            maxval = tempval;
            maxsub = i + 1;
        }
    }
    printf("Substance No.%d has the maximum refraction index of %.2f\n", maxsub, maxval);
    fclose(fp);
    return 0;
}

Comments on this post

MichaelSoft agrees: Nice compact solution (where is the comment ;-)) ... {and why can't I give you points for it}

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This is my code. Is it not nifty?

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Last edited by Itsacon : September 28th, 2005 at 04:50 AM. Reason: typo

September 28th, 2005, 04:54 AM

Itsacon

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Note, if you want the output to a file, and not the screen, either pipe it there, or add an

c Code:

Original - c Code
fo = fopen("ouput.txt", "w");

fo = fopen("ouput.txt", "w");

to the beginning of the main() (next to the fopen for the input file) and replace all occurences of

Code:

printf(

with

Code:

frpintf(fo,

September 28th, 2005, 05:02 AM

MichaelSoft

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So now we are making homework for others?
To my opinion one should show some code he has, and must point out where he got stuck. Building a complete solution from scratch will not help him learn anything...

Not that I can help myself sometimes ;-).

September 28th, 2005, 05:26 AM

Itsacon

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Yeah well, if we don't give him the code, he'll copy it off a classmate :-)
Besides, little parsers like this are so damn easy, I consider it a waste not to write them :-)

As for the points, I believe you can only give a certain amount of points to one user within a certain timespan.
See here

September 28th, 2005, 05:43 AM

bigdaddy

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Thanx Guys, You Saved me.. :)

Quote:

Originally Posted by Geo.Garnett

oh it supposed to be due in about 8hours time from when u last posted... anyway the program that u wrote is perfect...its works...thanx u just saved my ass..hahaha

September 28th, 2005, 06:04 AM

Itsacon

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Why did you remove your original post?
This way, this thread is of no use to other users anymore.

September 28th, 2005, 07:23 AM

Itsacon

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Original post.

To all latecomers, bigdaddy had a homework assignment he was too noob to understand, which essentlially was:

How to convert:

Code:

Input

3 // number of substances
5 // number of experiments for first substance
50 50 // in angle and out angle for first experiment
40 41 // etc
30 30
10 9
60 60
2 // number of experiments for second substance
35 26
63 42
3 // etc
20 8
50 18
71 23

To:

Code:

Output

Substance No.1
Data No.1 Angles(in:50, out:50) Rindex = 1.00
Data No.2 Angles(in:40, out:41) Rindex = 0.98
Data No.3 Angles(in:30, out:30) Rindex = 1.00
Data No.4 Angles(in:10, out:9) Rindex = 1.11
Data No.5 Angles(in:60, out:60) Rindex = 1.00
Average Rindex = 1.02

Substance No.2
Data No.1 Angles(in:35, out:26) Rindex = 1.31
Data No.2 Angles(in:63, out:42) Rindex = 1.33
Average Rindex = 1.32

Substance No.3
Data No.1 Angles(in:20, out:8) Rindex = 2.46
Data No.2 Angles(in:50, out:18) Rindex = 2.48
Data No.3 Angles(in:71, out:23) Rindex = 2.42
Average Rindex = 2.45

Substance No.3 has the maximum refraction index of 2.45

Where a Refraction index is calculated as:
Rindex = sin(in) / sin(out) (in & out in degrees)

Comments on this post

Geo.Garnett agrees: LOL Itsacon, "to noob to understand" =)..

#10

September 28th, 2005, 11:30 AM

Geo.Garnett

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Im not fast enough

I started trying to help this guy last night. Planning on helping him, but then I slept in, and ya'll just attacked this question. Most of the time a thread stays up for a couple of days before being answered even if there urgent. =) lol but anyway I probably could have done it as good anyways

#11

September 28th, 2005, 11:47 AM

MadCowDzz

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Doing someone else's homework goes against my beliefs
Hopefully the answers here should help future students in discovering their own solutions.

#12

September 28th, 2005, 11:59 AM

Geo.Garnett

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YA MadCowDzz

I'm a student, Not in my core classes yet, or my programming classes yet

So I like when ppl join only to post one or two homework assignments cause it lets me see the difficulty level that maybe some of my assignments might be like once I get there <