Question

java

estion7 For this question, assume all input comes from the keyboard, and al output goes to the screen. Include method prototypes and comments. The array should have room for 100 integers Write a complete Java program, including at least one comment in the main propram and one in e to do the following: Write a main program which will call the methods described below (a) First the main program will read an integer (this integer is a parameter or header Then the main values into an integer array which the main program will call x. cal k. program will call the method readdata) (see part 1 below) to read a set of data containing k value) which it wi (b) Th e main program will call the method countss() (see part 2 below), sending the x array (and k) (c) The main program will call the method sortarray0 (see part 3 below) to sort the first k elements of the x array into dessending order. The new values in the x array will be printed in the main program. Details of the methods: 1. Write a method called readdatal) which receives two parameters, an integer n and an integer array arr The method will be sent a value for n. The method will read a set of n data items into the arr array. The will print the set of data values as they are being read in method 2. Write a method called countss0 which receives two parameters, an integer n and an integer array vT method will count how many of the first n elements of the v array are greater t and how many are equal to 5. The han 5, how many are less than s, The method will print these values, with messages for each. As an example:if the array holds the values 5 66 -4 5 1-3, with n 6: there is 1 value greater than 5,there are 3 values less than 5, and there are 2 values equal to 5. 3. Write a method called sortarrayl) which receives two parameters, an integer array w and an integer the size of the array. The method will sort the first n elements of the w array into descending order. As an example, assume that method starts with these values in the w array: 5 66 4 5 1 -3, with n -6. Inside the method, these values will be sorted into descending order, the array willnow hold 6 5 5 1-3 4.

Answer 1

Coding :-

import java.util.Scanner;
public class p10
{
public int readdata(int n, int arr[])//method read array elements
{
int count=0;
for(int j=0;j<n;j++)
{
System.out.print(arr[j]+" ");
count=count+1;
  
}
System.out.println();
return count;
}
public void count5s(int n, int v[])//this method count array element greater than 5,less than 5 or equal to 5
{
int g5=0,l5=0,e5=0;
for(int k=0;k<n;k++)
{
if(v[k]>5)
{
g5=g5+1;
}
else if(v[k]<5)
{
l5=l5+1;
}
else if(v[k]==5)
{
e5=e5+1;
}
}
System.out.println("there is "+g5+" value greater than 5");
System.out.println("there is "+l5+" value less than 5");
System.out.println("there is "+e5+" value equalthan 5");
  
}
public void sortarray(int n, int w[])//this method sort the array elements in decending order
{
int temp=0;
for(int i=0;i<n;i++)
{
for(int j=0;j<n-i-1;j++)
{
if(w[j+1]>w[j])
{
temp=w[j];
w[j]=w[j+1];
w[j+1]=temp;
}
}
}
System.out.println("Now array elements are:");
for(int i=0;i<n;i++)
{
System.out.print(w[i]+" ");
}
}
public static void main()
{
Scanner s = new Scanner(System.in);
p10 ob = new p10();
System.out.println("Enter number of elements do you want to insert in array :");
int x=s.nextInt();//variable to hold size of array
int a[]=new int[x];//Integer type variable
for(int i=0;i<x;i++)//loop to insert array element
{
System.out.println("Enter "+(i+1)+" array element of array");
a[i]=s.nextInt();
}
System.out.println("OUTPUT 1: ");
int n=ob.readdata(x,a);
System.out.println("OUTPUT 2: ");
ob.count5s(n,a);
System.out.println("OUTPUT 3: ");
ob.sortarray(n,a);
}
}

Output:-

Enter number of elements do you want to insert in array :
6
Enter 1 array element of array
5
Enter 2 array element of array
66
Enter 3 array element of array
-4
Enter 4 array element of array
5
Enter 5 array element of array
1
Enter 6 array element of array
-3
OUTPUT 1:
5 66 -4 5 1 -3
OUTPUT 2:
there is 1 value greater than 5
there is 3 value less than 5
there is 2 value equal than 5
OUTPUT 3:
Now array elements are:
66 5 5 1 -3 -4