thanks nepomuk,
your explanation is really helpful, and i really understand how to implement the method a lot better now.
theres just one thing about your explanation that i dont understand-
your 'helparray' section.
i was just hoping you could explain this part a little bit more in detail.
for example, why is this array only 3 items deep? wouldnt it be easier to just use 2 values, allowing you to calculate...
tomshorts07
Last Activity: May 6 '08, 10:42 PM
Joined: Apr 17 '08
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thats what i was thinking of using, BUT in order to properly 'grade' the students- it has to return the percentage of the answers that are correct, which means possibly writing possibly hundreds of if () statements,
if anyone has any idea how to avoid this, im all ears!Leave a comment:
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alrighty, i figured it out kidprogrammer!
you have to define the variables in the beginning of the program
...Code:Scanner scan = new Scanner (System.in); //create a scanner double area; double n1=0; double n2=0; double n3=0; System.out.println("This program will average 3 numbers."); //explain the program System.out.println("PleaseLeave a comment:
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you didnt declare the variable correctly
all of those errors- (the ones that say cannot find symbol) are caused because you are supposed to use a 'double' variable type
rather than declare it as
reformat it to beCode:int area = (n1 + n2 + n3) / 3; //calculate the area
and it should work fine!Code:double area = (n1 + n2 + n3) / 3; //calculate the area
Leave a comment:
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i almost forgot- for the sake of ease - and maybe to help understand the program a little better, include the code----
...Code:public static void main (String[] args)throws IOException { int x = 0; int key[]; //array with the correct answers Scanner scan = new Scanner(new File("Grades"));//file with answer key and 'student answers' int size =Leave a comment:
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one more question!
hey everyone!
thanks so much for the help with my grading program that accesses from a file! i just have one more question, basically more of a syntax question
for those that want to refresh - the original discussion is posted here =
http://bytes.com/forum/thread794116.ht ml
what i need to know is, does anyone know how to formulate the code to COMPARE the 'answer key' array to the other arrays... -
Median Statistical function
hi everyone!
i was wondering if anyone had any ideas on how to go about coding a method that would determine the median of a list of numbers
just to clarify- a median is the 'middle value' when all of the numbers are placed in increasing order;
for example- the median of
3 6 12 40 41 57 58 90
is 40.5
i was thinking about using a method that sorts the list in increasing order, then... -
i understand-
the main problem that i am having with the program is the java.io.* functions?
i cant figure out how to compose the code to make the program read the file and create the array
im sorry, i should have specified this in the first post
if anyone can help me figure out just simply how to create the arrays from the .txt file, i should be fine from there!
THANKS A TON!Leave a comment:
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JAVA grading program
hey everyone, i'm new to JAVA, and i'm trying to make a program that takes a .txt file with the format
10 4 2 2 3 1 5 4 2 4 4
Joe, 4 4 1 3 2 5 4 2 4 3
Mary, 4 2 2 3 2 5 3 2 4 4
Fred, 3 2 2 3 1 5 4 2 4 4
***(the first line is the 'answer key'; the first number indicates the total number of answers, and the numbers that follow are the 'correct' answers.
the lines following the 'answer key' are...
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