lab5

#include <iostream>
#include <math.h>

using namespace std;

double TakeNum(const int MIN, const int MAX) {
    const string ERROR_CHOISE = "Проверьте корректность введнных данных!\n";
    bool isIncorrect;
    double num;
    do {
        isIncorrect = false;
        cin >> num;
        if (cin.fail()) {
            isIncorrect = true;
            cout << ERROR_CHOISE;
            cin.clear();
            while (cin.get() != '\n');
        }
        if (!isIncorrect && cin.get() != '\n') {
            cin.clear();
            while (cin.get() != '\n');
            cout << ERROR_CHOISE;
            isIncorrect = true;
        }
        if (!isIncorrect && (num < MIN || num > MAX)) {
            isIncorrect = true;
            cout << ERROR_CHOISE;
        }
    } while (isIncorrect);
    return num;
}

int main() {
    setlocale(LC_ALL, "Rus");
    double x, y;
    int R2 = 2, R1 = 1;

    cout << "Вариант 6\n";

    cout << "Задание 1.6\n";
        cout << "Введите X\n";
        x = TakeNum(-10000, 10000);
        if (x > 7)
            x *= 2;
        cout << "X = " << x << '\n';

    cout << "Задание 2.6 \n";
        cout << "Введите X, Y\n";
        x = TakeNum(-10000, 10000);
        y = TakeNum(-10000, 10000);
        if ((pow(x, 2) + pow(y, 2)) == 1)
            cout << "На границе\n";
        else if((pow(x, 2) + pow(y, 2)) < 1)
            cout << "Да\n";
        else
            cout << "Нет\n";

    cout << "Задание 3.6\n";
        cout << "Введите X\n";
        x = TakeNum(-10000, 10000);
        if (x <= -1)
            cout << (y = cos(pow(x, 2))) << '\n';
        else if (x >= 3)
            cout << (y = 2 / x) << '\n';
        else
            cout << (y = -fabs(x)) << '\n';

    cout << "Задание 4.6\n";
        cout << "Введите X\n";
        x = TakeNum(-10000, 10000);
        if (x <= -6 && x >= -7)
            cout << "y = 1";
        else if (x > -6 && x <= -4)
            cout << "y = " << (y = -0.5 * x - 2);
        else if (x > -4 && x <= 0)
            cout << "y = " << (y = sqrt(R2 * R2 - pow((-2 - x), 2)));
        else if (x > 0 && x < 2)
            cout << "y = " << (y = -sqrt(R1 * R1 - pow((1 - x), 2)));
        else if (x >= 2 && x <= 3)
            cout << "y = " << (y = -x + 2);
        else
            cout << "Нет значений";
}