C++ Overloading

I need help implementing maxPooling method for my Matrix class so that main.cpp could support the following statements:

M = 16; N = 24;

myMatrix matrix1(M, N, allOne); //sets a zero matrix

cout << "matrix1: " << matrix1 << endl;

myMatrix matrix2(M, N, "random");

cout << "matrix2: " << matrix2 << endl;

myMatrix matrix3(3, 3, "random");

cout << "matrix3: " << matrix3 << endl;

matrix2 = matrix1 + matrix2

cout << "matrix2: " << matrix2 << endl;

matrix2 = matrix2 * matrix3 //convolution

cout << "matrix2: " << matrix2 << endl;

matrix2 = matrix2.maxPooling() //Max pooling

cout << "matrix2: " << matrix2 << endl;