#include <stdio.h>
#include <stdlib.h>

#define MAX_SEQ 100

void analyzeFrequencies(int mainArray[], int counter[], int* mOI, int* numOfOccurences);

int main()
{
    int i=0, *mOI=0, *numOfOccurences=0, tempNum=0, mainArray[MAX_SEQ] = {0}, counter[MAX_SEQ] = {0};

    printf("Please enter a integer between 0-1000.nSequence will stop when you enter negative integer of after MAX_SEQ integers.nn");

    do
    {
        if( scanf("%d", &tempNum) == 1)
        {
            if (tempNum <= 1000)
            {
                if (tempNum < 0)
                {
                    printf("You decided to exit the sequence. Your array entered is:n");
                }
                else
                {
                    mainArray[i] = tempNum;
                    counter[tempNum]++;
                    ++i;
                }
            }
            else
                printf("Please enter a number between 0-1000. Exit sequence by entering negative number.n");
        }
        else
            printf("nError.n");

    } while(tempNum > 0 && i < MAX_SEQ);

    analyzeFrequencies(mainArray, counter, mOI, numOfOccurences); //This is where the problem occurs.

    if (i == 0)
    {
        printf("You entered no sequence.");
    }
    else
    {
        printf("nSequence:n");
        for(int j=0; j<i; j++)
        {
            printf("[%d] %dn", j, mainArray[j]);
        }

        printf("Most occurred item: %dnOccurred %d times!", *mOI, *numOfOccurences);
    }
}

void analyzeFrequencies(int mainArray[], int counter[], int* mOI, int* numOfOccurences)
{
    for(int i=0; i<MAX_SEQ; i++)
    {
        if(counter[i] > *numOfOccurences)
        {
            *mOI = i;
            *numOfOccurences = counter[i];
        }
    }
}