Matrix

//
// Created by anna on 20.04.18.
//
//declaration
#ifndef MATRIX_DECLARATION_H
#define MATRIX_DECLARATION_H


#include <algorithm>
#include <iostream>
using namespace std;



class Matrix{
    private: int m, n;
            int** array;
    public: Matrix(int**, int, int);
            int countColumns();
            int countRows();
            void addColumn(int*);
            void addRow(int*);
            ~ Matrix();
            Matrix(const Matrix &obj);
            Matrix&operator= (const Matrix &obj);
            class Row {
                private: Matrix *matrix;
                         int i;
                public: Row(Matrix* matrix, int i){
                            this->matrix = matrix;
                            this->i = i;
                        }
                        int& Row::operator[](int j) {
                            return (*matrix).array[i][j];
                        }
            };
            Row operator [] (int i){
                return Row(this, i);
            }


};
#endif MATRIX_DECLARATION_H



//implementation
#include "cmake-build-debug/declaration.h"
// Created by anna on 20.04.18.
//

int Matrix::countColumns() {
    return this->n;
}
int Matrix::countRows(){
    return this->m;
}
Matrix::Matrix(int ** arr, int m, int n) {
    this->m = m;
    this->n = n;
    this->array = new int*[m];
    for(int i=0; i<m; i++)
        this->array[i] = new int[n];
    copy(arr, arr + n*m, this->array);
}
Matrix::~Matrix() {
    for(int i=0;i<m; i++)
        delete [] this->array[i];
    delete this->array;
}
Matrix::Matrix(const Matrix &obj) {
    m = obj.m;
    n = obj.n;
    array = new int*[m];
    for(int i=0; i<m; i++)
        array[i] = new int[n];
    copy(obj.array, obj.array+n*m, array);
}
Matrix& Matrix::operator=(const Matrix &obj) {
    swap(n, obj.n);
    swap(m, obj.m);
    swap(array, obj.array);
}
Matrix::addColumn(int *column) {
    n++;
    int ** array = new int*[m];
    for(int i=0; i<m; i++)
        array[i] = new int[n];
    for(int i=0; i<m; i++)
        for(int j=0; j<n; j++)
            if(j == n-1) array[i][j] = column[i];
            else array[i][j] = this->array[i][j];
    swap(array, this->array);
    for(int i=0;i<m; i++)
        delete [] array[i];
    delete array;
}