#include <labs.h>

using IterationF = function<double(int i)>;
using LoopF = function<double(int min, int max, IterationF &f)>;

double iteration(double x, double i);
double mp_for(int min, int max, IterationF &f);
double mp_while(int min, int max, IterationF &f);
double mp_do_while(int min, int max, IterationF &f);

void lab3()
{
    LoopF loopF;
    IterationF f;
    double x, y;
    int n;
    char c;

    cout << "Enter x: ";
    cin >> x;

    f = [=](int i)
    { return iteration(x, i); };

    cout
        << "Enter N: ";
    cin >> n;

    loop // while (1)
    {
        cout << endl
             << "Select mode (F/W/D): ";
        cin >> c;

        switch (c)
        {
        case 'f':
        case 'F':
            loopF = mp_for;
            break;
        case 'w':
        case 'W':
            loopF = mp_while;
            break;
        case 'd':
        case 'D':
            loopF = mp_do_while;
            break;

        default:
            cout << "Invalid mode, exiting!" << endl;
            return;
        }

        y = pow(loopF(1, n, f), 1.2 * x);
        cout << "Result y(" << x << ") = " << y << endl;
    }
}

double iteration(double x, double i)
{
    return 2.8 * pow(x, 4.5) + cbrt(i);
}

double mp_for(int min, int max, IterationF &f)
{
    double res = 1.0;

    for (int i = min; i <= max; i++)
    {
        res += f(i);
    }

    return res;
}

double mp_while(int min, int max, IterationF &f)
{
    double res = 1.0;

    int i = min;
    while (i <= max)
    {
        res += f(i);
        i++;
    }

    return res;
}

double mp_do_while(int min, int max, IterationF &f)
{
    double res = 1.0;

    if (min >= max)
        return res;

    int i = min;
    do
    {
        res += f(i);
        i++;
    } while (i <= max);

    return res;
}