HW1_deviations

#include <cstdio>
#include <cstdlib>
#include <cmath>

int min(const int *arr, int n)
{
    int min = 10000;
    for (int i = 0; i < n; ++i)
    {
        if (*(arr + i) < min)
        {
            min = arr[i];
        }
    }
    return min;
}

double sm(const int *arr, int n)
{
    int sum = 0;
    for (int i = 0; i < n; ++i)
    {
        sum += *(arr + i);
    }
    return sum / n;
}

double sd(const int *arr, int n)
{
    double s = sm(arr, n);
    double ans = 0;
    for (int i = 0; i < n; ++i)
    {
        ans += pow(arr[i] - s, 2.0);
    }
    return sqrt(ans / (n - 1));
}



int main()
{
    int n = 0;
    scanf("%d", &n);

    int *arr = (int *) malloc(n * sizeof(int));

    if (!arr)
        return 1;

    for (int i = 0; i < n; i++)
    {
        scanf("%d", arr + i);
    }

    printf("min is %d\n", min(arr, n));
    printf("simple mean is %f\n", sm(arr, n));
    printf("standart devation is %f\n", sd(arr, n));

    return 0;
}