Find Median of 1D Array Using Functions in C

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

// Function to compare two integers for sorting
int compareIntegers(const void *a, const void *b) {
    return (*(int *)a - *(int *)b);
}

// Function to calculate the median of an array
double findMedian(int arr[], int size) {
    // Sort the array in ascending order
    qsort(arr, size, sizeof(int), compareIntegers);

    // If the array has an odd number of elements, return the middle element
    if (size % 2 != 0) {
        return (double)arr[size / 2];
    }
    // If the array has an even number of elements, return the average of the two middle elements
    else {
        int mid1 = arr[(size - 1) / 2];
        int mid2 = arr[size / 2];
        return ((double)mid1 + mid2) / 2.0;
    }
}

int main() {
    int size;

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

    if (size <= 0) {
        printf("Invalid array size.\n");
        return 1;
    }

    int arr[size];

    printf("Enter %d elements:\n", size);
    for (int i = 0; i < size; i++) {
        scanf("%d", &arr[i]);
    }

    double median = findMedian(arr, size);

    printf("Median of the array: %.2f\n", median);

    return 0;
}