delete

#include <iostream>

using namespace std;

// Class IntMat
class IntMat
{
    size_t rows;
    size_t cols;
    int *data;

public:
    IntMat(size_t rows, size_t cols) : rows(rows), cols(cols)
    {
        data = new int[rows * cols]{};
    }
    ~IntMat()
    {
        delete[] data;
    }
    IntMat(const IntMat &) = delete;
    IntMat &operator=(const IntMat &) = delete;
    int getElement(size_t r, size_t c);
    bool setElement(size_t r, size_t c, int value);
};

int IntMat::getElement(size_t r, size_t c)
{
    if (r >= this->rows || c >= this->cols)
    {
        cerr << "Indices are out of range" << endl;
        return 0;
    }
    return data[this->cols * r + c];
}

bool IntMat::setElement(size_t r, size_t c, int value)
{
    if (r >= this->rows || c >= this->cols)
        return false;

    data[this->cols * r + c] = value;
    return true;
}

// Class FloatMat
class FloatMat
{
    size_t rows;
    size_t cols;
    float *data;

public:
    FloatMat(size_t rows, size_t cols) : rows(rows), cols(cols)
    {
        data = new float[rows * cols]{};
    }
    ~FloatMat()
    {
        delete[] data;
    }
    FloatMat(const FloatMat &) = delete;
    FloatMat &operator=(const FloatMat &) = delete;
    float getElement(size_t r, size_t c);
    bool setElement(size_t r, size_t c, float value);
};

float FloatMat::getElement(size_t r, size_t c)
{
    if (r >= this->rows || c >= this->cols)
    {
        cerr << "getElement(): Indices are out of range" << endl;
        return 0.f;
    }
    return data[this->cols * r + c];
}

bool FloatMat::setElement(size_t r, size_t c, float value)
{
    if (r >= this->rows || c >= this->cols)
    {
        cerr << "setElement(): Indices are out of range" << endl;
        return false;
    }
    data[this->cols * r + c] = value;
    return true;
}

int main()
{
    IntMat imat(3, 4);
    imat.setElement(1, 2, 256);
    FloatMat fmat(2, 3);
    fmat.setElement(1, 2, 3.14159f);

    // FloatMat fmat2(fmat); //error

    // FloatMat fmat3(2,3);
    // fmat3 = fmat; //error

    cout << imat.getElement(1, 2) << endl;
    cout << fmat.getElement(1, 2) << endl;

    return 0;
}