Description

To find K largest elements from array, sort the array in ascending
order and print the elements from end.

C/C++

/* C program to Find K largest elements from array */
//Save it as FindGivenLargestElementArray.c

#include<stdio.h>
int main(){

    int i, k, n;

    printf("Enter the size of array : ");
    scanf("%d",&n);

    int arr[n];

    printf("Enter the array element : ");
    for(i=0;i<n;i++) {
        scanf("%d",&arr[i]);
    }

    printf("Enter the number of largest element to find : ");
    scanf("%d",&k);

    //Sort the array
    asc_sort(arr,n);

    //Print K number of elements from last
    printf("The %d largest elements of array : ",k);
    for(i=n-1;i>=(n-k);i--) {
        printf("%d ",arr[i]);
    }

    return 0;
}

//Function for sorting the array
void asc_sort(int a[], int n)
{
 int i, j, temp;
 for(i=0;i<n-1;i++)
 {
  for(j=i+1;j<n;j++)
  {
   if(a[i]>a[j])
   {
    temp = a[i];
    a[i] = a[j];
    a[j] = temp;
   }
  }
 }
}

Input:
Enter the size of array : 
5
Enter the array element : 
12
52
34
61
23
Enter the number of largest element to find : 
3

Output:
The 3 largest elements of array : 
61 52 34

Java

/* Java program to Find K largest elements from array */
//Save it as FindGivenLargestElementArray.java

import java.io.*;
import java.util.Arrays;
import java.util.Scanner;

public class FindGivenLargestElementArray {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        
        System.out.println("Enter the size of array : ");
        int n = scanner.nextInt();
        
        int arr[] = new int[n];
        
        System.out.println("Enter the array element : ");
        for(int i=0;i<n;i++) {
            arr[i] = scanner.nextInt();
        }
        
        System.out.println("Enter the number of larget element to find : ");
        int k = scanner.nextInt();
                
                //Sort the array
                Arrays.sort(arr);
        
                //Print K number of elements from last
                System.out.println("The "+k+" largest elements of array : ");
                for(int i=n-1;i>=(n-k);i--) {
        	        System.out.print(arr[i]+" ");
                }
    }
}

Input:
Enter the size of array : 
5
Enter the array element : 
12
52
34
61
23
Enter the number of larget element to find : 
3

Output:
The 3 largest elements of array : 
61 52 34

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