Equivalent Arrays

#include<stdio.h>

int equivalentArray(int a[], int b[], int size_a, int size_b) {
    int result = 0, i, j, count_matches, count_missmatch = 0;

    int matching_numbers[size_a];

    for (i = 0, count_matches = 0; i < size_a; i++) { // check all values in the array 1

        for (j = 0; j < size_b; j++) { // compare the current value with all values inside array 2

            if (a[i] == b[j]) {
                count_matches++;
                matching_numbers[count_matches] = a[i];
            } else {
                count_missmatch++;
            }

        }

    }

    if (count_missmatch > 0 && (count_matches == size_a || count_matches == size_b)) {
        result = 1;
    }

    return result;
}

int main() {
    int i, size_1, size_2, comparison;

    printf("Enter the size of your 1st array: ");
    scanf("%d", &size_1);

    int array_1[size_1];

    printf("\nEnter array values\n");
    for (i = 0; i < size_1; i++) {
        printf("%d. array element: ", i+1);
        scanf("%d", &array_1[i]);
    }

    // enter the second array

    printf("\n\nEnter the size of your 2nd array: ");
    scanf("%d", &size_2);

    int array_2[size_2];

    printf("\nEnter array values\n");
    for (i = 0; i < size_2; i++) {
        printf("%d. array element: ", i+1);
        scanf("%d", &array_2[i]);
    }

    // compare the two arrays
    comparison = equivalentArray(array_1, array_2, size_1, size_2);
    printf("\nThe returned value = %d", comparison);

    return 0;
}