Write a program that reads an array and counts and prints duplicate elements in the array.


Difficulty level
This exercise is mostly suitable for students
#include<stdio.h>
#include<conio.h>
#define SIZE 100

void main()
{
	int A[SIZE];
	int N;
	int i, j;
	int count=0;

	do {
		printf("Enter N: ");
		scanf("%d", &N);
	} while (N <= 0 || N > SIZE);

	printf("Enter A: ");
	for (i = 0;i < N;i++)
		scanf("%d", &A[i]);

	 
	// we will loop on the array
	// and check if the current element repeats 
	// in the remaining array
	// if it's the case, we will print it
	// if it's not repeating, we skip it

	// we check all the elements
	for (i = 0;i < N;i++)
		// for each element, we check the remaining elements
		for(j=i+1; j < N; j++)
			// if 2 elements are equal, we increment count
			// and print the element
			if(A[i]==A[j])
			{
				printf("%d ", A[i]);
				count++;
			}

	

	printf("Number of duplicate elements is equal to %d\n", count);

 	getch();
	 
}

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