#include <stdio.h>
#include <math.h>

double m1(double *arr, int n)
{
    double t, arrange_sum = 0;
    for (int i = 0; i < n; i++)
    {
        t = arr[i] / n;
        arrange_sum += t;
    }

    return arrange_sum;
}

double m2(double *arr1, int n)
{
    double max;
    max = arr1[0];
    for (int i = 1; i < n; i++)
    {
        if (arr1[i] > max)
            max = arr1[i];
    }
    return max;
}

int make_a1(double *arr, int n, double arrange_sum)
{
    int count = n;
    for (int i = 0; i < n; i++)
    {
        for (int k = 0; k < n; k++)
            printf ("%lf ",arr[k]);
        printf("\n");
        if ((arr[i] - arrange_sum) > 1e-10)
        {
            for (int j = i; j < count; j++)
            {
                arr[j] = arr[j+1];
            }
            count--;
            i--;
        }
    }

    return count;
}

void make_a2(double *arr, int n, int p, double mu2)
{
    int i = p;
    double t, t1;
    t = arr[p];
    arr[p] = mu2;

    while (i < n + 1)
    {
        t1 = t;
        t = arr[i];
        arr[i+1] = t1;

        i++;
    }
}

void test_m1()
{
    double eps = 1e-5;
    double rez;
    int err_counter = 0;
    // Test 1
    double a[5] = {1, 2, 3, 4, 5};
    rez = m1(a,5);
    if (fabsf(rez - 3)>eps)
        err_counter++;

    // Test 2
    double a1[4] = {0, 2, 0, 2};
    rez = m1(a1,4);
    if (fabsf(rez - 1) > eps)
        err_counter++;
    // Test 3
    double a2[5] = {1.1, 2.2, 3.3, 4.4, 5.5};
    rez = m1(a2,5);
    if (fabsf(rez - 3.3) > eps)
        err_counter++;
    printf("Error test of m1 function : %s\n", err_counter ? "FAILED" : "OK");
}

void test_m2()
{
    double eps = 1e-5;
    double rez;
    int err_counter = 0;
    // Test 1
    double a[9] = {1, 2, 3, 4, 5, 4, 3, 2, 1};
    rez = m2(a,5);
    if (rez != 5)
        err_counter++;

    // Test 2
    double a1[4] = {0, 2, 0, 2};
    rez = m2(a1,4);
    if (rez != 2)
        err_counter++;
    // Test 3
    double a2[5] = {-5.0, -4.2, -3.4, -2.1, 0};
    rez = m2(a2,5);
    if (rez != 0)
        err_counter++;
    printf("Error test of m2 function : %s\n", err_counter ? "FAILED" : "OK");

}

void test_make_a1()
{
    double eps = 1e-5;
    double rez;
    int err_counter = 0;
    // Test 1
    double a[5] = {1, 2, 3, 4, 5};
    rez = make_a1(a,5, 3);
    printf("rez = %lf\n", rez);
    if (rez != 3)
        err_counter++;

    // Test 2
    double a1[4] = {0, 2, 0, 2};
    rez = make_a1(a1, 4, 0.5);
    if (rez != 2)
        err_counter++;
    // Test 3
    double a2[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    printf("rez = %lf\n", rez);
    rez = make_a1(a2, 10, 5.5);
    printf("rez = %lf\n", rez);
    if (rez != 5)
        err_counter++;
    printf("Error test of make_a1 function : %s\n", err_counter ? "FAILED" : "OK");

}

void test_make_a2()
{

    printf("OK");
}


int main()
{
    double a[10] = {1,2,3,4,5,6,7,8,9,10};
    printf("%lf\n",m1(a,10));
    test_m1();
    test_m2();
    test_make_a1();
    test_make_a2();
    return 0;
}