Write a program that reads an array and finds and counts the total number of duplicate elements.

#include <stdio.h>
#include <conio.h>
#define NB_ELEMENT 10

void main()
{
	int size;
	int A[NB_ELEMENT], NB_occ[NB_ELEMENT];
	int counter;
	int i, j;


	do{
		printf("Enter the number of elements: ");
		scanf("%d", &size);
	}while(size<=0 || size > NB_ELEMENT);
	
	for (i = 0; i < size ; i++) {
		printf("Enter Element %d: ", i );
		scanf("%d", &A[i]);
	}
 
	// for each element loop on the rest of the array
	// count the number of appearance of the elements
	// and save it in a new array
	for (i = 0; i<size; i++)
	{
		counter = 1;
		for (j = i; j<size; j++)
			if (A[i] == A[j])
			{
				NB_occ[i] = counter;
				counter++;
			}
	}

	printf("\n\nDuplicated elements: ");
	counter = 0;
	for (i = 0; i<size; i++)
		if (NB_occ[i] == 2)
		{
			printf("%d ", A[i]);
			counter++;
		}

	printf("\nThe number of duplicate elements in the array is equal to: %d \n", counter);
	getch();
}