Calculate median of an integer vector in C

median.c

double calculate_median(int vector[], int size) {
	double median;
	median = 0;

	sort(vector, size); // sort the vector with preferred method

	if (size%2 != 0) {
		median = vector[(int)size/2];
	} else {
		median = ((double)vector[size/2] + (double)vector[(size/2) - 1]) / 2;
	}

	return median;
}