parallel array concepts

[bryce_21]

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

[Insectoid]

What's the problem you're having? Have you tried anything at all?

[bryce_21]

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]);     } }

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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 ]

[Insectoid]

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?

[bryce_21]

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

[Insectoid]

Here's a question for ya: Does letterGradeCounts[5] even exist?

[Zren]

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.

[Tony]

bryce_21 -- please keep the discussion to this thread, instead of creating duplicate threads.

[bryce_21]

how can i use the above algorithm with parallel array concepts to reference and store does grades

[bryce_21]

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: