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18 October, 02:37

Question 1 of 2. Count Frequency: [50 marks] Write a function that counts the frequencies of array elements. Your program will take an array as input from the user. Write a function called CountFreq ( ...) that takes the array as a parameter and print all elements and their frequencies. You can print the elements in any order.

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Answers (1)
  1. 18 October, 05:05
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    The solution (Java programming Language) is given in the explanation section

    Pay attention to comments for explanation

    Explanation:

    import java. util. Scanner;

    public class num2 {

    public static void main (String[] args) {

    //Calling the CountFreq in the main method

    CountFreq ();

    }

    //Defining the CountFreq Method

    public static void CountFreq () {

    Scanner in = new Scanner (System. in);

    System. out. println ("Enter array size");

    int arrSize = in. nextInt ();

    //Creating the array

    int [] arr = new int[arrSize];

    //Creating another array to hold number frequencies

    int [] freqArray = new int[arr. length];

    //For counting occurence of a the same number

    int count;

    //Receiving the elements of the array

    System. out. println ("Enter array Elements: ");

    for (int i=0; i
    {

    System. out. println ("Enter the values");

    arr[i] = in. nextInt ();

    System. out. printf ("%d", arr[i]);

    //Intialize frequency to - 1

    freqArray[i] = - 1;

    }

    //Checking for occurence of numbers, Increasing the count variable

    //Avoiding duplicates

    for (int i=0; i
    {

    count = 1;

    for (int j=i+1; j
    {

    //Check for duplicate

    if (arr[i]==arr[j])

    {

    count++;

    / / Avoid counting same element twice

    freqArray[j] = 0;

    }

    }

    //If frequency of current element is not counted

    if (freqArray[i]! = 0)

    {

    freqArray[i] = count;

    }

    }

    //Output of frequencies

    System. out. println ("Frequency of all elements of array");

    for (int i=0; i
    {

    if (freqArray[i]! = 0)

    {

    System. out. printf ("%d occurs %d times/n", arr[i], freqArray[i]);

    }

    }

    }

    }
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