#include<conio.h>
#include<iostream>
#include<Windows.h>
using namespace std;
void coordinates(int x, int y)
{
	COORD gt = { x, y };
	HANDLE hnd = GetStdHandle(STD_OUTPUT_HANDLE);
	SetConsoleCursorPosition(hnd, gt);
}
void graphicScreenSaver() {
	system("cls");
	int x = 0, y = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0, x3 = 0, y3 = 0, x4 = 0, a4 = 0, y4 = 0, m = 0;
	float a = 0, a1 = 0, a2 = 0, a3 = 0;
	HWND hwnd = GetConsoleWindow();
	HDC dc = GetDC(hwnd);
	RECT window = {};
	HBRUSH brush;
	brush = CreateSolidBrush(RGB(255, 0, 0));
	HBRUSH brush1;
	brush1 = CreateSolidBrush(RGB(255, 255, 0));
	HBRUSH brush2;
	brush2 = CreateSolidBrush(RGB(0, 255, 0));
	HBRUSH brush3;
	brush3 = CreateSolidBrush(RGB(255, 0, 255));
	RECT WinCoord = {};
	GetWindowRect(hwnd, &WinCoord);
	RECT rect;
	GetClientRect(hwnd, &rect);
	while (a < 25) {
		SelectObject(dc, brush);
		Sleep(5);
		x1 = 250 + 100 * sin(2 * a);
		y1 = 165 + 100 * sin(2 * a);
		a += 0.01;
		Ellipse(dc, x1, y1, x1 + 30, y1 + 30);
		SelectObject(dc, brush1);
		x = 250 + 100 * sin(2 * a);
		y = 165 - 100 * sin(2 * a);
		a1 += 0.01;
		Ellipse(dc, x, y, x + 30, y + 30);
		SelectObject(dc, brush2);
		x2 = 250 - 100 * sin(2 * a2);
		y2 = 165 - 100 * sin(2 * a2);
		a2 += 0.01;
		Ellipse(dc, x2, y2, x2 + 30, y2 + 30);
		SelectObject(dc, brush3);
		x3 = 250 - 100 * sin(2 * a3);
		y3 = 165 + 100 * sin(2 * a3);
		a3 += 0.01;
		Ellipse(dc, x3, y3, x3 + 30, y3 + 30);
	}
	ReleaseDC(hwnd, dc);
	cin.get();
	system("pause");
}
float q(float x)
{
	return 2 * pow(pow(x, 2) + 1, 1/3) - 3 * sin(x) - 5;
}
void equation() {
	system("cls");
	float a = 7.15, b = 12.7, c, e = 0.001;
	while (b - a > e)
	{
		c = (a + b) / 2;
		if (q(b) * q(c) < 0)
			a = c;
		else
			b = c;
	}
	coordinates(5, 10);
	cout << "Решение уравнения методом половинного деления на интервале [7.15; 12.7]";
	coordinates(5, 11);
	cout << "2 * pow(pow(x, 2) + 1, 1/3) - 3 * sin(x) = 5 равен: " << c;
	system("pause >nul");
}
void graphs() {
	system("mode 80, 25");
	cout << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl << endl;
	cout << endl << endl << endl << " ";
	float x;
	HDC hDC = GetDC(GetConsoleWindow());
	HPEN Pen1, Pen2, Pen3;
	Pen1 = CreatePen(PS_SOLID, 3, RGB(192, 192, 192));
	SelectObject(hDC, Pen1);
	MoveToEx(hDC, 0, 200, NULL);
	LineTo(hDC, 555, 200);
	MoveToEx(hDC, 245, 0, NULL);
	LineTo(hDC, 245, 400);

	MoveToEx(hDC, 540, 210, NULL);
	LineTo(hDC, 555, 200);
	LineTo(hDC, 540, 190);
	MoveToEx(hDC, 230, 10, NULL);
	LineTo(hDC, 245, 0);
	LineTo(hDC, 260, 10);

	SetBkColor(hDC, RGB(0, 0, 0));
	SetTextColor(hDC, RGB(192, 192, 192));
	TextOutA(hDC, 210, 5, "Y", 1);
	TextOutA(hDC, 545, 220, "X", 1);
	for (x = -3.14; x <= 3.14; x += 0.01f)
	{
		Sleep(4);
		Pen2 = CreatePen(PS_SOLID, 3, RGB(128, 0, 0));
		SelectObject(hDC, Pen2);
		MoveToEx(hDC, 50 * x + 305, -40 * (2 - cos(x)) + 200, NULL);
		LineTo(hDC, 50 * x + 305, -40 * (2 - cos(x)) + 200);
		Pen3 = CreatePen(PS_SOLID, 3, RGB(0, 128, 0));
		SelectObject(hDC, Pen3);
		MoveToEx(hDC, 50 * x + 305, -40 * sqrt(x + 4) + 200, NULL);
		LineTo(hDC, 50 * x + 305, -40 * sqrt(x + 4) + 200);
	}
	SelectObject(hDC, Pen1);
	{
		SetBkColor(hDC, RGB(0, 0, 0));
		SetTextColor(hDC, RGB(192, 192, 192));
		TextOutA(hDC, 80, 55, "y(f)=2-cos(x)", 13);
		SetBkColor(hDC, RGB(0, 0, 0));
		SetTextColor(hDC, RGB(192, 192, 192));
		TextOutA(hDC, 80, 125, "y(f)=sqrt(x+4)", 20);
	}
	cin.get();
	system("pause");
	system("cls");
}
float z(float x)
{
	return pow((x), 2) * exp(-x);
}
float quad_integral(float a, float b, int n, float(*f)(float))
{
	float h, res, x;
	int i;
	h = (b - a) / n;
	res = 0;
	for (i = 0; i < n - 1; i++)
	{
		x = a + i * h;
		res = res + f(x);
	}
	res = h * res;
	return res;
}
void integral() {
		system("cls");
		float i;
		float a, b, s;
		coordinates(20, 7);
		cout << "Введите интервал [a,b]";
		coordinates(20, 8);
		cout << "a = ";
		cin >> a;
		coordinates(20, 9);
		cout << "b = ";
		cin >> b;
		coordinates(20, 10);
		cout << "Введите число разбиений n > 50 ";
		cin >> s;
		i = quad_integral(a, b, s, z);
		coordinates(20, 11);
		cout << "Интеграл равен " << i;
		system("pause >nul");
}
float maxf(float* m, int N)
{
	float max;
	max = m[0];
	for (int i = 1; i < N; i++)
	{
		if (m[i] > max)
			max = m[i];
	}
	return max;
}
float minf(float* m, int N)
{
	float min;
	min = m[0];
	for (int i = 1; i < N; i++)
	{
		if (m[i] < min)
			min = m[i];
	}
	return min;
}
void table() {
	system("cls");
	float F1[20], F2[20];
	float a = -3.14, b = 3.14;
	float f1, f2, x, dx;
	int n = 16;
	dx = (abs(b) + abs(a)) / (n - 1);
	x = a;
	coordinates(4, 2);
	cout << "|  I |       X |     F1 |      F2 |" << endl;
	coordinates(4, 3);
	cout << "|____|_________|________|_________|";
	for (int i = 0; i < n; i++)
	{
		f1 = (2 - cos(x));
		f2 = sqrt(x + 4);
		F1[i] = f1;
		F2[i] = f2;
		coordinates(4, 4 + i);
		printf("| %3d| %8.4f|%8.4f| %8.4f|\n", i + 1, x, F1[i], F2[i]);
		x += dx;
	}
	coordinates(45, 9);
	cout << "Минимальное F1 = " << minf(F1, n);
	coordinates(45, 10);
	cout << "Минимальное F2 = " << minf(F2, n);
	coordinates(45, 12);
	cout << "Максимальное F1 = " << maxf(F1, n);
	coordinates(45, 13);
	cout << "Максимальное F2 = " << maxf(F2, n);
	system("pause >nul");
}
void aboutTheAuthor() {
	system("cls");
	coordinates(20, 7);
	cout << "Расчетно - графическая работа выполнена";
	coordinates(20, 8);
	cout << "Студентом группы ПИН-191";
	coordinates(20, 9);
	cout << "Пешехоновым Никитой Алексеевичем";
	coordinates(20, 10);
	cout << "ОмГТУ ФИТиКС АСОИУ 2019";
	system("pause >nul");
}
void menu() {
	do {
		int key = 0;
		int code;
		do {
			system("cls");
			key = (key + 7) % 7;
			coordinates(30, 5);
			if (key == 0)
			{
				cout << ">Графическая заставка";
			}
			else
			{
				cout << " Графическая заставка";
			}
			coordinates(30, 7);
			if (key == 1)
			{
				cout << ">Уравнение";
			}
			else
			{
				cout << " Уравнение";
			}
			coordinates(30, 9);
			if (key == 2)
			{
				cout << ">Графики";
			}

			else
			{

				cout << " Графики";
			}
			coordinates(30, 11);
			if (key == 3)
			{
				cout << ">Интеграл";
			}
			else
			{
				cout << " Интеграл";
			}
			coordinates(30, 13);
			if (key == 4)
			{
				cout << ">Таблица";
			}
			else
			{
				cout << " Таблица";
			}
			coordinates(30, 15);
			if (key == 5)
			{
				cout << ">Об авторе";
			}
			else
			{
				cout << " Об авторе";
			}
			coordinates(30, 17);
			if (key == 6)
			{
				cout << ">Выход";
			}
			else
			{
				cout << " Выход";
			}
			code = _getch();
			if (code == 224)
			{
				code = _getch();
				if (code == 80) key++;
				if (code == 72) key--;
			}
			if (key > 7) key = 0;
			if (key < 0) key = 6;
		} while (code != 13);
		if (key == 0) graphicScreenSaver();
		if (key == 1) equation();
		if (key == 2) graphs();
		if (key == 3) integral();
		if (key == 4) table();
		if (key == 5) aboutTheAuthor();
		if (key == 6) exit(0);
	} while (true);
}
void main() {
	system("mode 80, 25");
	setlocale(LC_ALL, "rus");
	menu();
}