Computer Science Canada

parallel array concepts
Author:  bryce_21 [ Tue Apr 15, 2014 4:22 pm ]
Post subject:  parallel array concepts
help using the parallel array concepts to reference and store the number of all "A" grades (>=90) at array index 0.........please look at the attachment below for more details....


please anyone who know java programming i need so assists....on this project i am working on
Author:  Insectoid [ Tue Apr 15, 2014 5:01 pm ]
Post subject:  RE:parallel array concepts
What's the problem you're having? Have you tried anything at all?
Author:  bryce_21 [ Tue Apr 15, 2014 5:42 pm ]
Post subject:  RE:parallel array concepts
here's my program
the i have problems with this project is creating the parallel array to reference and store the number of all A,B,C,D,F at array index0-4,

Java:

public class project04 {

    public static void main(String[] args) {
    rand_distribution();
   
   }
    public static  void rand_distribution () {
        char letterGrades=0;
        Random r = new Random();
        int A=0,B=0,C=0,D=0,F=0;
        int sum =0;
        int []grades = new int [100];
        int [] letterGradeCounts = new int[5]; //A,B,C,D,F
        for ( int i = 0; i< 100; i++ )
        {
             letterGradeCounts[5] = grades[i];
            grades[i] = (int)(10 * r.nextGaussian()+7);
            sum += grades[i];
           if (90 <= grades[i] && grades[i] <=  100) {
                letterGrades = 'A';
                 A++;
            } else if (80 <= grades[i] && grades[i] < 90) {
                letterGrades='B';
                B++;
            } else if (70 <=  grades[i] && grades[i] < 80)  {
                letterGrades= 'C';
                 C++;
            } else if (60 <= grades[i] && grades[i] < 70) {
                letterGrades= 'D';
                D++;
            } else if (50 <= grades[i] && grades[i] < 60) {
                letterGrades= 'F';
                 F++;
            }
             
        }
Arrays.sort (grades);
for (int j=0; j<100; j++ )
    System.out.println("Sorted Array values" + grades);
    System.out.println("Minimum Value: " + grades[0]);
    System.out.println("Maximum value:" + grades[99]);
    }
}



Mod Edit:
Please wrap you code in either of the following in order to preserve whitespace (indentation) and to highlight the syntax.
code:

[syntax="java"] ... code ... [/syntax]

[code] ... code ... [/code ]
Author:  Insectoid [ Tue Apr 15, 2014 6:21 pm ]
Post subject:  RE:parallel array concepts
code:
int A=0,B=0,C=0,D=0,F=0;


The whole point of the array is so that you don't need these variables.

code:
char letterGrades=0;


what's this variable for?

code:
letterGradeCounts[5] = grades[i];


What's the line supposed to do?
Author:  bryce_21 [ Tue Apr 15, 2014 6:30 pm ]
Post subject:  RE:parallel array concepts
letterGradeCounts[5] = grades[i]; was suppose to reference to the array grades[] to store all the number of "A-F" at array index 0-4 using the parallel array concept
Author:  Insectoid [ Tue Apr 15, 2014 6:44 pm ]
Post subject:  RE:parallel array concepts
Here's a question for ya: Does letterGradeCounts[5] even exist?
Author:  Zren [ Tue Apr 15, 2014 7:03 pm ]
Post subject:  RE:parallel array concepts
code:
else if (50 <= grades[i] && grades[i] < 60) {


What happens when a grade is 42?

Edit: Stop PMing me. Just post your questions in this thread so anyone can answer.

Quote:
if you can help with understanding how to reference and store the number of all "A - F" at array index 0-4.

on this project that would be a blessing....please and thank you

on my project it ask me to create another array and parallel array concept to reference and store the number of all "A grades (>=90) at array index 0 ........


Edit 2:
Reread the question. It's asking you to _count_ the number of grades that fall under A, B, etc. Then store those counts in the array.

Edit 3:

Here's the basic algorithm:
code:

Populate the grades array
Default the counters to 0
For each grade:
    if grade is in the range of an 'A':
        Increment the counter counting the number of A grades.
    else if grade is in the range of an 'B':
        Increment the counter counting the number of B grades.
    else if ...


In this case, "Increment the counter counting the number of A grades." would be letterGradeCounts[0]++, as letterGradeCounts is representing the counters for all the grades grouped by the "letter grade". The first index (0) representing the grades that fall under A.
Author:  Tony [ Wed Apr 16, 2014 12:33 am ]
Post subject:  RE:parallel array concepts
bryce_21 -- please keep the discussion to this thread, instead of creating duplicate threads.
Author:  bryce_21 [ Wed Apr 16, 2014 11:22 am ]
Post subject:  RE:parallel array concepts
how can i use the above algorithm with parallel array concepts to reference and store does grades
Author:  bryce_21 [ Wed Apr 16, 2014 1:14 pm ]
Post subject:  RE:parallel array concepts
help on this java project on arrays

Write a JAVA program that (1) creates a one-dimensional array and uses a random number
generator(gaussian random numbers with a mean of 70 and a standard deviation of 10)to
populate the array with at least 100 but no more than 200 integer numbers representing exam
grades between zero(0) and 100 inclusive, (3) creates another one-dimensional array and use
the parallel array concept to reference and store the number of all "A" grades(>=90) at array
index 0, all "B" grades(80 - 89) at array index 1, all "C" grades(70 - 79) at array index 2, all "D"
grades(60 - 69) at array index 3, and all "F" grades(<60) at array index 4, (4) determines the
minimum and maximum exam grades, (5) computes the class average for the exam, and (6)
outputs the computed information in the following format:
MIDTERM EXAM RESULTS
AVERAGE: 76.00% MINIMUM: 22% MAXIMUM: 96%
A - 5
B - 7
C -12
D - 4
F - 3
Notes:

:


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