Question

Write a program that instantiates an array of integers named scores. Let the size of the array be 10. The program then first invokes randomFill to fill the scores array with random numbers in the range of 0 -100. Once the array is filled with data, methods below are called such that the output resembles the expected output given.

The program keeps prompting the user to see if they want to evaluate a new set of random data. Find below the names of methods and their description.

Hint: All methods are static and they will be in StatsArray.java under the main method. Please check out the static method demo before start working on this assignment.

• public static void randomFill (int [] data)

This method fills an array with random numbers in the range of 0-100

• public static int getTotal(int [] data)

This method calculates and returns the total of all values in the array

• public static double getAvg(int[] data)

This method returns the average of the values in the array

• public static int getLargest(int [] data)

This method finds and returns the largest value in the array

• public static int getSmallest(int [] data)

This method finds and returns the smallest value in the array

• public static int findLetterGrade(int lowRange, int highRange, int data [])

       The method counts and returns the number of values between the given range inclusive.

• public static boolean isNumberFound(int someNumber, int data [])

This method returns true if the array contains someNumber , return false otherwise.

• public static void displayData(int[] data)

This method displays the array with index in [ ] as shown in the given output.

Hint: In order to get number of A’s the range will be between 90-100 inclusive and for the number of B’s the range will be between 80-89 inclusive

Expected Output:

Exam Scores ----------- [0] 51 [1] 0 [2] 91 [3] 8 [4] 96 [5] 11 [6] 74 [7] 27 [8] 80 [9] 20 The minimum value : 0 The maximum value : 96 The total is : 458 The average is : 45.8 Number of A's : 2 Number of B's : 1 Sorry, you DO NOT have a perfect exam score. Please enter Y to continue and N to quit: y Exam Scores ----------- [0] 59 [1] 75 [2] 91 [3] 50 [4] 45 [5] 85 [6] 12 [7] 82 [8] 84 [9] 68 The minimum value : 12 The maximum value : 91 The total is : 651 The average is : 65.1 Number of A's : 1 Number of B's : 3 Sorry, you DO NOT have a perfect exam score. Please enter Y to continue and N to quit: n Goodbye!

import java.util.*;

/**
 * Program name: StatsArray.java
 * @author 
 * Class:
 * Date:  
 * Description: Makes a random array of number and that are used to represent
 * test scores at random and allows the user to continually make new ones
 */
public class StatsArray {
    

        public static void main(String[] args) {
                final int SIZE = 10;
                //Declaring scores array
                int[] stats = new int[SIZE];
        
                //Your code 
                
                
                
                
                
                
                
                
        
}  // end of main method

/**
 * This method randomFill fills array with random numbers in the range of 0-100
 * @param data array to be filled with random numbers
 */
        public static void randomFill( int[] data ) {
            
           Random rand = new Random();
           
            for( int i = 0; i < data.length; ++i ) {
            
                data[i] = rand.nextInt(101);
                
           }


   }  //end randomFill method
        
        
        //ADD the rest of the static methods given in the assignment below. 
        
        
        
  
} //end of StatsArray Class 

Answer 1

Screenshot

Program

import java.util.*;

/**
* Program name: StatsArray.java
* @author
* Class:
* Date:
* Description: Makes a random array of number and that are used to represent
* test scores at random and allows the user to continually make new ones
*/
public class StatsArray {
  

        public static void main(String[] args) {
                final int SIZE = 10;
                //Declaring scores array
                int[] stats = new int[SIZE];
                char ch;
                Scanner sc=new Scanner (System.in);
                do {
                   randomFill(stats);
                   displayData(stats);
                   System.out.println("The minimum value : "+getSmallest(stats));
                   System.out.println("The maximum value : "+getLargest(stats));
                   System.out.println("The total is : "+getTotal(stats));
                   System.out.printf("The average is : %.1f\n",getAvg(stats));
                   System.out.println("Number of A's : "+findLetterGrade(90,100,stats));
                   System.out.println("Number of B's : "+findLetterGrade(80,89,stats));
                   if(findLetterGrade(90,100,stats)==SIZE) {
                       System.out.println("Congradulation, you have a perfect exam score.");
                   }
                   else {
                       System.out.println("Sorry, you DO NOT have a perfect exam score.");
                   }
                   System.out.print("Please enter Y to continue and N to quit: ");
                   ch=sc.nextLine().charAt(0);
                   while(Character.toUpperCase(ch)!='Y' && Character.toUpperCase(ch)!='N') {
                       System.out.print("Please enter Y to continue and N to quit: ");
                       ch=sc.nextLine().charAt(0);
                   }
                }while(Character.toUpperCase(ch)=='Y');
} // end of main method

/**
* This method randomFill fills array with random numbers in the range of 0-100
* @param data array to be filled with random numbers
*/
        public static void randomFill( int[] data ) {
          
           Random rand = new Random();
         
            for( int i = 0; i < data.length; ++i ) {
          
                data[i] = rand.nextInt(101);
              
           }

   } //end randomFill method
        /**
         * This method calculates and returns the total of all values in the array
         * @param data
         * @return total
         */
      
   public static int getTotal(int [] data) {
       int total=0;
       for( int i = 0; i < data.length; ++i ) {
         
          total+= data[i];
         
      }
       return total;
   }
   /**
    * This method returns the average of the values in the array
    * @param data
    * @return avg
    */
   public static double getAvg(int[] data) {
       return (double)getTotal(data)/data.length;
   }
   /**
    * This method finds and returns the largest value in the array
    * @param data
    * @return large
    */
   public static int getLargest(int [] data) {
       int large=data[0];
       for( int i = 1; i < data.length; ++i ) {
           if(large<data[i]) {
               large=data[i];
           }
       }
       return large;
   }
   /**
    * This method finds and returns the smallest value in the array
    * @param data
    * @return small
    */
   public static int getSmallest(int [] data) {
       int small=data[0];
       for( int i = 1; i < data.length; ++i ) {
           if(small>data[i]) {
               small=data[i];
           }
       }
       return small;
   }
   /**
    * The method counts and returns the number of values between the given range inclusive.
    * @param lowRange
    * @param highRange
    * @param data
    * @return cnt
    */
   public static int findLetterGrade(int lowRange, int highRange, int data []) {
       int cnt=0;
       for( int i = 0; i < data.length; ++i ) {
           if(data[i]>=lowRange && data[i]<=highRange) {
               cnt++;
           }
       }
       return cnt;
   }
   /**
    * This method returns true if the array contains someNumber , return false otherwise.
    * @param someNumber
    * @param data
    * @return true/false
    */
   public static boolean isNumberFound(int someNumber, int data []) {
       for( int i = 0; i < data.length; ++i ) {
           if(data[i]==someNumber) {
               return true;
           }
       }
       return false;
   }
   /**
    * This method displays the array with index in [ ] as shown in the given output.
    * @param data
    */
   public static void displayData(int[] data) {
       System.out.println("Exam Scores\r\n-----------");
       for( int i = 0; i < data.length; ++i ) {
           System.out.println("["+i+"] "+data[i]);
       }
   }

} //end of StatsArray Class

----------------------------------------------------------------

Output

Exam Scores
-----------
[0] 19
[1] 73
[2] 37
[3] 61
[4] 81
[5] 35
[6] 10
[7] 12
[8] 89
[9] 78
The minimum value : 10
The maximum value : 89
The total is : 495
The average is : 49.5
Number of A's : 0
Number of B's : 2
Sorry, you DO NOT have a perfect exam score.
Please enter Y to continue and N to quit: y
Exam Scores
-----------
[0] 23
[1] 52
[2] 29
[3] 49
[4] 4
[5] 1
[6] 11
[7] 6
[8] 47
[9] 14
The minimum value : 1
The maximum value : 52
The total is : 236
The average is : 23.6
Number of A's : 0
Number of B's : 0
Sorry, you DO NOT have a perfect exam score.
Please enter Y to continue and N to quit: n