C++ How MergeSort returns nothing but works fine?

This is the implementation of merge sort below. However, I don’t understand how this code even works. We don’t use pointers and nothing is returned in main(). So, how does it manipulate myarray? Can anyone explain? Here is the code: #include < iostream > using namespace std; void merge(int arr[], int l, int m, int… Read More C++ How MergeSort returns nothing but works fine?

Merge sort algorithim not working consistently and giving wrong output

I have tried to implement merge sort and this is my code: import java.util.*; public class MergeSort{ public static void main(String args[]){ int n; Scanner sc=new Scanner (System.in); System.out.println("Enter the size of array"); n = sc.nextInt(); int a[]=new int[n]; System.out.println("Enter the elements into array"); for(int i=0;i<n;i++){ a[i]=sc.nextInt(); } divide(a,0,n-1); } public static void divide(int a[],… Read More Merge sort algorithim not working consistently and giving wrong output

I have written this Merge Sort program in C. It shows "Segmentation fault (core dumped)" after implementation of arrays

#include<stdio.h> void mergesort(); void merge(); int main() { int a[40],n; printf("\nEnter the number of elements:"); scanf("%d",&n); printf("\nEnter the %d elements:",n); for(int i=0;i<n;i++) { scanf("%d",&a[i]); } mergesort(a,0,n-1); printf("\nThe Sorted array is: "); for(int i=0;i<n;i++) { printf("%d ",a[i]); } return 0; } void mergesort(int a[],int first,int last) { int mid; if(first<last) { mid=(mid+last)/2; mergesort(a,first,mid); mergesort(a,mid+1,last); merge(a,first,mid,last); }… Read More I have written this Merge Sort program in C. It shows "Segmentation fault (core dumped)" after implementation of arrays

Java Error: Comparator is not abstract and does not override abstract method compare(Object,Object) in Comparator

I have a Sorting.java file, with the following structure: public class Sorting { public static <T> void mergeSort(T[] arr, Comparator<T> comparator) { (…) } } My goal is to test the mergeSort() method in a separate Driver.java file. To that effect, here is what I included in that driver file: import java.util.Comparator; import java.io.*; import… Read More Java Error: Comparator is not abstract and does not override abstract method compare(Object,Object) in Comparator