Chart!

I'm making a program that lets the user enter a bunch of info, like student grades for example... then the program will produce a chart using the entered data.


Chart should look like this:

Number of
Students
10 |
9 |
8 |
7 |
6 |
5 |
4 | *
3 |
2 | *
1 | * * *
0 | *
-----------------------------------------------------------
0 1 2 3 4 5 6 7 8 9 10

Whats the best way of getting the *'s in the chart??

Good to know. Did you have a question, or was your intent to simply inform us of your programming adventures?

[edit]

Quote:

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Originally Posted by 98dodgeneondohc

Whats the best way of getting the *'s in the chart??

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printf with a for loop?

Quote:

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Originally Posted by pianorain

Good to know. Did you have a question, or was your intent to simply inform us of your programming adventures?

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lol! sorry man.. I accidentally pressed enter half way through the post before posting the question. :p

> Whats the best way of getting the *'s in the chart??

Code:

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putchar( '*' );

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Quote:

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Originally Posted by 98dodgeneondohc

lol! sorry man.. I accidentally pressed enter half way through the post before posting the question. :p

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Heh...aye. It would help if you posted some code demonstrating your attempt. Otherwise, we can't really help.

I see the Y axis is the number of students, but what's the X axis of the chart?

Quote:

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Originally Posted by itsme86

I see the Y axis is the number of students, but what's the X axis of the chart?

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The grades probably going from 0 to 10 .

how will it know where to put the *'s based on what the user enters??? .... X is number of students and Y is marks by the way

There is a post regarding your question on the board as well. A quick search should help you out on how to get started.

Quote:

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Originally Posted by GanglyLamb

The grades probably going from 0 to 10 .

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Probably. But I've learned not to make assumptions from peoples' questions on here ;) For instance, maybe it's percentage of wrong or right answers divided by 10. Who knows?

Here's a hint

1. char chart[10][10];
2. Fill it with spaces
3. Fill in the stars, as you would say drawing the thing on graph paper
4. print it all out.

I just handed in an assignment like this last week for my programming in c class. It's just a simple histogram.

Code:

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void histogram(double input[],double range, double max, double min,char fname[], int n)
{
        double storage_bins[22];
        double factor;
        double top;
        double bottom;
        double increment;
        double top2 ;
        double minimum;
        double scale;
        double cur_value;
        double stars_to_print;
        int i;
        int j;
        int max_hist;
        int line;
        int sum = 0;
        system("cls");
        factor = factor_function(range);
        top = ceil(max*factor)/factor;
        top2 = top;
        bottom = floor(min*factor)/factor;
        increment = (top-bottom)/10.;
        printf("Histogram for %s\n", fname);
        /* 1. Find the number of occurances of a file between certain ranges*/
        minimum = top - increment/2.;
        for(i = 0; i < 22; i ++)
        {
                if(i == 0)
                {
                        for(j = 0; j < n; j++)
                        {
                                if(input[j] == top2)
                                        sum +=1;
                        }
                storage_bins[i] = sum;
       
                }
                else
                {                       
                               
                        for(j = 0; j <n; j ++)
                        {
               
                                if(input[j] <= top2 && input[j] > minimum)
                                {
                                        sum += 1;
                                }
                        storage_bins[i] = sum;
                        }
               
       
                        top2 = top2 - increment/2.;
                minimum = minimum - increment/2;
                }
        sum = 0;
               
               
       
        }
       
          /* 2. Calculate the number of stars to print for each bin*/

        max_hist = storage_bins[0];
        for (i=1; i<22; i++)
        {
                if(storage_bins[i]>max_hist)
                        max_hist = storage_bins[i];

        }
       
        scale = max_hist/60.;
        for (line=0; line<21; line++)
                storage_bins[line] = storage_bins[line]*scale +.5;
        /* 3. Print the Histogram and the stars. */


        for(line=1, cur_value=top; line<= 21; line++, cur_value-=increment/2.)
        {
                //if line is odd, print the current value.
                if(line%2)
                        printf("%f\t", cur_value);
                else
                //if line is even don't print a value. shows a space
                        printf("\t\t");

                //prints the vertical line
                printf("| ");
                //calculates how many stars to print for the data in the current range
                stars_to_print = storage_bins[line-1] * scale;
                //prints stars
                for(i=0;i < stars_to_print; i ++)
                        printf("*");
               
       
       
                printf("\n");
        }

        printf("press any key to continue...");
        getche();

}

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hope this helps

> I just handed in an assignment like this last week for my programming in c class.
And how does that help the OP?

We try to help people understand what they're trying to do - however difficult it might seem initially. Spoon-feeding answers is in no-ones long term interest.

yea, I'm very sorry. I read that on the homework for the messages. I was just too excited that i knew how to do it. next time i will be more careful. If an admin would like to take down that last post go ahead...