lesson 8

lesson_8/exercise_1.hpp

@@ -0,0 +1,40 @@
+#ifndef EXERCISE_1_HPP_
+#define EXERCISE_1_HPP_
+
+class DivisionByZero
+{
+private:
+	std::string m_message;
+public:
+	DivisionByZero(std::string message = "") : m_message(message) {}
+	const std::string& getMessage() const { return m_message; }
+};
+
+namespace my
+{
+
+template <typename T>
+double div(T a, T b)
+{
+	if (b == 0)
+		throw DivisionByZero("Деление на ноль!");
+
+	return a / b;
+}
+
+}
+
+void exercise_1()
+{
+	try
+	{
+		double result = my::div(10, 0);
+		std::cout << result << std::endl;
+	}
+	catch (const DivisionByZero& e)
+	{
+		std::cerr << e.getMessage() << std::endl;
+	}
+}
+
+#endif

lesson_8/exercise_2.hpp

@@ -0,0 +1,48 @@
+#ifndef EXERCISE_2_HPP_
+#define EXERCISE_2_HPP_
+
+class Ex
+{
+public:
+	double m_x;
+
+	Ex(double x) : m_x(x) {};
+};
+
+class Bar
+{
+private:
+	double m_y;
+public:
+	Bar(double y = 0.0) : m_y(y) {}
+	void set(double a)
+	{
+		if ((m_y + a) > 100)
+			throw Ex(a * m_y);
+		else
+			m_y = a;
+	}
+};
+
+void exercise_2()
+{
+	Bar a;
+	int b;
+
+	try
+	{
+		while (true)
+		{
+			std::cin >> b;
+			if (b == 0)
+				break;
+			a.set(b);
+		}
+	}
+	catch (const Ex& e)
+	{
+		std::cout << e.m_x << std::endl;
+	}
+}
+
+#endif

lesson_8/exercise_3.hpp

@@ -0,0 +1,127 @@
+#ifndef EXERCISE_3_HPP_
+#define EXERCISE_3_HPP_
+
+class OffTheField
+{
+	int cur_pos_x;
+	int cur_pos_y;
+	int new_pos_x;
+	int new_pos_y;
+	std::string m_message;
+public:
+	OffTheField(int c_x, int c_y, int n_x, int n_y) :
+			cur_pos_x(c_x), cur_pos_y(c_y), new_pos_x(n_x), new_pos_y(n_y), m_message("")
+	{
+		if (new_pos_x > 10 || new_pos_x < 1)
+		{
+			m_message += "Ошибка координаты X! Робот выходит за границу поля!\n";
+			m_message += '[' + std::to_string(cur_pos_x) + ';' + std::to_string(cur_pos_y) + "] => [" +
+					std::to_string(new_pos_x) + ';' + std::to_string(new_pos_y) + "]\n";
+		}
+		if (new_pos_y > 10 || new_pos_y < 1)
+		{
+			m_message += "Ошибка координаты Y! Робот выходит за границу поля!\n";
+			m_message += '[' + std::to_string(cur_pos_x) + ';' + std::to_string(cur_pos_y) + "] => [" +
+					std::to_string(new_pos_x) + ';' + std::to_string(new_pos_y) + "]\n";
+		}
+	}
+
+	const std::string& getInfo() const
+	{
+		return m_message;
+	}
+};
+
+class IllegalCommand
+{
+private:
+	int cur_pos_x;
+	int cur_pos_y;
+	int new_pos_x;
+	int new_pos_y;
+	std::string m_message;
+public:
+	IllegalCommand(int c_x, int c_y, int n_x, int n_y) :
+		cur_pos_x(c_x), cur_pos_y(c_y), new_pos_x(n_x), new_pos_y(n_y), m_message("")
+	{
+		if (abs(cur_pos_x - new_pos_x) > 1)
+		{
+			m_message += "Ошибка координаты X! Шаг слишком велик!\n";
+			m_message += '[' + std::to_string(cur_pos_x) + ';' + std::to_string(cur_pos_y) + "] => [" +
+					std::to_string(new_pos_x) + ';' + std::to_string(new_pos_y) + "]\n";
+		}
+
+		if (abs(cur_pos_y - new_pos_y) > 1)
+		{
+			m_message += "Ошибка координаты Y! Шаг слишком велик!\n";
+			m_message += '[' + std::to_string(cur_pos_x) + ';' + std::to_string(cur_pos_y) + "] => [" +
+					std::to_string(new_pos_x) + ';' + std::to_string(new_pos_y) + "]\n";
+		}
+
+		if (cur_pos_x == new_pos_x && cur_pos_y == new_pos_y)
+		{
+			m_message += "Ошибка координаты X и Y! Нельзя шагнуть на текущее место!\n";
+			m_message += '[' + std::to_string(cur_pos_x) + ';' + std::to_string(cur_pos_y) + "] => [" +
+					std::to_string(new_pos_x) + ';' + std::to_string(new_pos_y) + "]\n";
+		}
+	}
+
+	const std::string& getInfo() const
+	{
+		return m_message;
+	}
+};
+
+class Robot
+{
+private:
+	int pos_x;
+	int pos_y;
+public:
+	Robot(int x = 5, int y = 5) : pos_x(x), pos_y(y)
+	{
+		std::cout << "Начальная позиция робота: [" << pos_x << ';' << pos_y << ']' << std::endl;
+	}
+
+	void move(int x, int y)
+	{
+		if (abs(pos_x - x) > 1 || abs(pos_y - y) > 1 || (pos_x == x && pos_y == y))
+			throw IllegalCommand(pos_x, pos_y, x, y);
+		if (x > 10 || x < 1 || y > 10 || y < 1)
+			throw OffTheField(pos_x, pos_y, x, y);
+
+		std::cout << "Робот шагнул [" << pos_x << ';' << pos_y << "] => [" << x << ';' << y << ']' << std::endl;
+
+		pos_x = x;
+		pos_y = y;
+	}
+};
+
+void exercise_3()
+{
+	int x = 0, y = 0;
+	Robot r;
+
+	while (true)
+	{
+		std::cin >> x >> y;
+
+		if (x == 0 && y == 0)
+			break;
+
+		try
+		{
+			r.move(x, y);
+		}
+		catch (const IllegalCommand& e)
+		{
+			std::cerr << e.getInfo() << std::endl;
+		}
+		catch (const OffTheField& e)
+		{
+			std::cerr << e.getInfo() << std::endl;
+		}
+	}
+}
+
+#endif

lesson_8/main.cpp

@@ -0,0 +1,15 @@
+#include <iostream>
+#include "exercise_1.hpp"
+#include "exercise_2.hpp"
+#include "exercise_3.hpp"
+
+using namespace std;
+
+int main()
+{
+	exercise_1();
+	exercise_2();
+	exercise_3();
+
+    return 0;
+}