C++ programming:

*we have build the header files to make this main work : ( All related functions should be implemented. If you implement operator == don't forget to add operator !=)

*The initialization take O(1) time (no matter what the matrix size).

#include #include #include "matrix.h" #include "symetric_matrix.h"

using namespace std;

int main () { const Matrix m1; // Creates 3*2 matrix, with all the default elements set to 0; cout << m1 << endl; Matrix m2(4); // Creates 3*3 matrix, with the default elements equals to 4; cout << m2 << endl; const Matrix m3 = m2; // C-py constructor may take O(MN) and not O(1). cout << m3 << endl;

// min() returns the minimal value in the matrix. if (min(m1) < min(m3)) cout << "Min value of m3(" << min(m3) << ") is bigger than min value of m1(" << min(m1) << ")" << endl;

if (m1.avg() < m3.avg()) // Compares the average of the elements cout << "Average value of m3(" << m3.avg() << ") is bigger than average value of m1(" << m1.avg() << ")" << endl;

m2(0, 0) = 13; cout << m2[0][0] << " " << m2[1][0] << endl; // Should print "13 4"

try { cout << m2 + m3 << endl; cout << m3 * m1 << endl; // You can choose the format of matrix printing; cout << m1 * m2; // This should throw an exception } catch (const Matrix::IllegalOperation& e) { cout << e.what() << endl; }

Matrix m4; m4 = m3; cout << m4 << endl; for (int i = 0; i < 3; ++i) for (int j = 0; j < 3; ++j) m4(i, j) = i+j; cout << m4 << endl;

cout << "m4[1][1] = " << m4[1][1] << endl;

cout << "m4[1][1] = " << m4(1,1) << endl; // m4(1,1) same result as m4[1][1]

Matrix m5(3); m5 = 2 * m4; cout << m5 << endl; Matrix m6(m4); cout << m6 << endl; m5 += m4; cout << m5 << endl;

if (m6 != m5) cout << "m6 != m5" << endl;

Matrix, 4, 4> composite(m1); // Creates matrix, where each element is m1;

cout << composite;

unique_ptr> symetric_matrix(new SymetricMatrix(5)); // SymetricMatrix matrix 3*3 with default element equals to 5;

(*symetric_matrix)(1, 2) = 8; cout << (*symetric_matrix)(1, 2) << " " << (*symetric_matrix)(2, 1) << endl;; // Should print "8 8" cout << (*symetric_matrix)[1][2] << " " << (*symetric_matrix)[2][1] << endl;; // Should print "8 8"

return 0; }