HA22_1

#include <iostream>

using namespace std;

// Задача матрица

class Matrix {
private:
    int** matrix;
    int rows;
    int cols;

public:
    Matrix(int new_rows, int new_cols) {
        this->rows = new_rows;
        this->cols = new_cols;
        this->matrix = new int*[new_rows];
        for (int i = 0; i < this->rows; ++i) {
            matrix[i] = new int[new_cols];
        }
        for (int i = 0; i < this->rows; ++i) {
            for (int j = 0; j < this->cols; ++j) {
                matrix[i][j] = 0;
            }
        }
    }

    // Конструктор копирования
    Matrix(const Matrix& other) {
        rows = other.rows;
        cols = other.cols;
        matrix = new int*[rows];
        for (int i = 0; i < rows; ++i) {
            matrix[i] = new int[cols];
            for (int j = 0; j < cols; ++j) {
                matrix[i][j] = other.matrix[i][j];
            }
        }
    }

    ~Matrix() {
        for (int i = 0; i < this->rows; ++i) {
            delete[] this->matrix[i];
        }
        delete[] this->matrix;
    }

    Matrix operator+ (const Matrix& other) {
        if (this->rows == other.rows && this->cols == other.cols) {
            Matrix new_matrix(this->rows, this->cols);
            for (int i = 0; i < this->rows; ++i) {
                for (int j = 0; j < this->cols; ++j) {
                    new_matrix.matrix[i][j] = this->matrix[i][j] + other.matrix[i][j];
                }
            }
            return new_matrix;
        } else {
            cout << "Разные размерности!" << endl;
            return Matrix(0, 0);
        }
    }

    // Оператор умножения
    Matrix operator* (const Matrix& other) {
        if (this->cols != other.rows) {
            cout << "Разные размерности!" << endl;
            return Matrix(0, 0);
        }
        Matrix result(this->rows, other.cols);
        for (int i = 0; i < this->rows; ++i) {
            for (int j = 0; j < other.cols; ++j) {
                result.matrix[i][j] = 0; // Initialize result element to 0
                for (int k = 0; k < this->cols; ++k) {
                    result.matrix[i][j] += this->matrix[i][k] * other.matrix[k][j];
                }
            }
        }
        return result;
    }

    void print() const {
        for (int i = 0; i < this->rows; ++i) {
            for (int j = 0; j < this->cols; ++j) {
                cout << matrix[i][j] << ' ';
            }
            cout << '\n';
        }
    }
};

// Код для проверки
int main() {
    Matrix mat1(2, 2);
    Matrix mat2(2, 2);
    Matrix sum = mat1 + mat2;
    sum.print();
    return 0;
}