Class inheritance, copy constructor and set/get functions

manpreet Best Answer 2 years ago

I got the following class:

class Matrix{
    private:
        int rows;
        int columns;
        double* matrix;
    public:
        Matrix();
        explicit Matrix(int N);
        Matrix(int M, int N);
        void setValue(int M, int N, double value);
        double getValue(int M, int N);
        bool isValid() const;
        int getRows();
        int getColumns();
        ~Matrix();
        friend ostream& operator<<(ostream &out, Matrix&matrix1);

        Matrix &operator=(const Matrix &m) {
            if (rows * columns != m.rows * m.columns){
                delete [] this->matrix;
                this->matrix = new double[m.rows * m.columns];
            }
            rows = m.rows;
            columns = m.columns;
            for(int i = 0; i < rows; i++){
                for(int j = 0; j < columns; j++){
                    this->matrix[i * columns + j] = m.matrix[i * columns + j];
                }
            }
            return *this;
        }
        Matrix(const Matrix &rhs);
};

with these functions

#include 
#include "Matrix.h"
using namespace std;

//OPPGAVE 2
Matrix::Matrix(){
    matrix = NULL;
}

Matrix::Matrix(int N){
    matrix = 
                                                

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