lesson 8 #8

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alexander wants to merge 1 commits from lesson_8 into master
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lesson_8/exercise_1.hpp Normal file
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#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

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lesson_8/exercise_2.hpp Normal file
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#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

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lesson_8/exercise_3.hpp Normal file
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#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

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lesson_8/main.cpp Normal file
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#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;
}