/*
 * C Program to Print all the Repeated Numbers with Frequency in an Array
 */
#include <stdio.h>
#include <malloc.h>

void duplicate(int array[], int num)
{
    int *count = (int *)calloc(sizeof(int), (num - 2));
    int i;
    printf("duplicate elements present in the given array are ");
    for (i = 0; i < num; i++)
        {
            if (count[array[i]] == 1)
                printf(" %d ", array[i]);
            else
                count[array[i]]++;
        }
}

int main()
{
    int array[] = {5, 10, 10, 2, 1, 4, 2};
    int array_freq = sizeof(array) / sizeof(array[0]);
    duplicate(array, array_freq);
    getchar();
    return 0;
}

/*

duplicate elements present in the given array are  10  2