initial pre-alfa version

pr5.cpp

@@ -0,0 +1,244 @@
+#include <iostream>
+#include <fstream>
+#include <typeinfo>
+#include <cstring>
+#include <utility>
+using namespace std;
+
+class Exception: public exception
+{
+protected:
+    // Сообщение об ошибке
+    char* str;
+public:
+    Exception(const char* s)
+    {
+        str = new char[strlen(s) + 1];
+        strcpy(str, s);
+    }
+    Exception(const Exception& e)
+    {
+        str = new char[strlen(e.str) + 1];
+        strcpy(str, e.str);
+    }
+    ~Exception()
+    {
+        delete[] str;
+    }
+    // Функцию вывода можно будет переопределить в производных
+    // классах, когда будет ясна конкретика
+    virtual void print()
+    {
+        cout << "Exception: " << str;
+    }
+};
+
+class BaseMatrix
+{
+protected:
+    double** ptr;
+    int height;
+    int width;
+
+public:
+    BaseMatrix(int Height = 2, int Width = 2)
+    {
+        if (Height <= 0 || Width <= 0)
+            throw Exception("Non-positive size of matrix");
+        height = Height;
+        width = Width;
+        ptr = new double*[height];
+        for (int i = 0; i < height; i++)
+            ptr[i] = new double[width];
+    }
+
+    BaseMatrix(const BaseMatrix& M) : height(M.height), width(M.width)
+    {
+        ptr = new double*[height];
+        for (int i = 0; i < height; i++)
+        {
+            ptr[i] = new double[width];
+            for (int j = 0; j < width; j++)
+                ptr[i][j] = M.ptr[i][j];
+        }
+    }
+
+    BaseMatrix(double** arr, int Height, int Width) : height(Height), width(Width)
+    {
+        ptr = new double*[height];
+        for (int i = 0; i < height; i++)
+        {
+            ptr[i] = new double[width];
+            for (int j = 0; j < width; j++)
+                ptr[i][j] = arr[i][j];
+        }
+    }
+
+    ~BaseMatrix()
+    {
+        if (ptr != NULL)
+        {
+            for (int i = 0; i < height; i++)
+                delete[] ptr[i];
+            delete[] ptr;
+            ptr = NULL;
+        }
+    }
+
+    void print()
+    {
+        for (int i = 0; i < height; i++)
+        {
+            for (int j = 0; j < width; j++)
+                cout << ptr[i][j] << " ";
+            cout << "\n";
+        }
+    }
+
+    double& operator()(int row, int column)
+    {
+        if (row < 0 || column < 0 || row >= height || column >= width)
+            throw Exception("Index is out of bounds");
+        return ptr[row][column];
+    }
+
+    BaseMatrix& operator=(const BaseMatrix& other)
+    {
+        if (this != &other)
+        {
+            for (int i = 0; i < height; i++)
+                delete[] ptr[i];
+            delete[] ptr;
+
+            height = other.height;
+            width = other.width;
+
+            ptr = new double*[height];
+            for (int i = 0; i < height; i++)
+            {
+                ptr[i] = new double[width];
+                for (int j = 0; j < width; j++)
+                    ptr[i][j] = other.ptr[i][j];
+            }
+        }
+        return *this;
+    }
+
+    friend ostream& operator<<(ostream& ustream, BaseMatrix obj);
+    friend istream& operator>>(istream& ustream, BaseMatrix& obj);
+};
+
+ostream& operator<<(ostream& ustream, BaseMatrix obj)
+{
+    if (typeid(ustream).name() == typeid(ofstream).name())
+    {
+        ustream << obj.height << " " << obj.width << "\n";
+        for (int i = 0; i < obj.height; i++)
+        {
+            for (int j = 0; j < obj.width; j++)
+                ustream << obj.ptr[i][j] << "\n";
+        }
+        return ustream;
+    }
+    for (int i = 0; i < obj.height; i++)
+    {
+        for (int j = 0; j < obj.width; j++)
+            ustream << obj.ptr[i][j] << " ";
+        ustream << "\n";
+    }
+    return ustream;
+}
+
+istream& operator>>(istream& ustream, BaseMatrix& obj)
+{
+    if (typeid(ustream) == typeid(ifstream))
+        ustream >> obj.height >> obj.width;
+    for (int i = 0; i < obj.height; i++)
+        for (int j = 0; j < obj.width; j++)
+            ustream >> obj.ptr[i][j];
+    return ustream;
+}
+
+class MultidimensionalArray : public BaseMatrix
+{
+public:
+    MultidimensionalArray(int Height = 2, int Width = 2) : BaseMatrix(Height, Width) {}
+
+    MultidimensionalArray(const MultidimensionalArray& M) : BaseMatrix(M) {}
+
+    MultidimensionalArray(double** arr, int Height, int Width) : BaseMatrix(arr, Height, Width) {}
+
+    MultidimensionalArray& operator=(const MultidimensionalArray& other)
+    {
+        BaseMatrix::operator=(other);
+        return *this;
+    }
+
+    pair<double, double> calculateCenterOfMass()
+    {
+        double totalMass = 0.0;
+        double weightedSumX = 0.0;
+        double weightedSumY = 0.0;
+
+        for (int i = 0; i < height; ++i)
+        {
+            for (int j = 0; j < width; ++j)
+            {
+                double mass = ptr[i][j];
+                totalMass += mass;
+                weightedSumX += j * mass; // умножаем координату на массу
+                weightedSumY += i * mass; // умножаем координату на массу
+            }
+        }
+
+        if (totalMass == 0.0)
+        {
+            return make_pair(-1.0, -1.0); // Или другое значение по умолчанию
+        }
+
+        double centerX = weightedSumX / totalMass;
+        double centerY = weightedSumY / totalMass;
+
+        return make_pair(centerX, centerY);
+    }
+};
+
+int main()
+{
+    try
+    {
+        MultidimensionalArray Wrong(-2, 0);
+    }
+    catch (Exception e)
+    {
+        cout << "\nException has been caught: ";
+        e.print();
+    }
+
+    cout << "\n";
+
+    MultidimensionalArray M;
+    cin >> M;
+
+    ofstream fout("out.txt");
+    if (fout.is_open())
+    {
+        fout << M;
+        fout.close();
+    }
+
+    ifstream fin("out.txt");
+    MultidimensionalArray M1;
+    if (fin)
+    {
+        fin >> M1;
+        fin.close();
+    }
+
+    cout << M1;
+
+    char c1;
+    cin >> c1;
+
+    return 0;
+}