#include<stdio.h>

double mean(int vector[]){

	int sum = 0;
	for (int i = 0; i < 6; ++i)
	{
		sum = sum + vector[i];
	}

	double result = (sum / 6.0);
	printf("%f\n", result);
	return result;

}

int main(int argc, char const *argv[])
{
	int v[6] = {1, 2, 3, 4, 5, 6};
	double x = mean(v);
	return 0;
}