I need to print static matrix overloading "<<" operator. Here is my code:

    class Matrix 
{
public:
    int matrix[3][3];
    friend std::ostream& operator<<(std::ostream& out, const Matrix& e);
};

 std::ostream& operator<<(std::ostream& out, const Matrix& e)
{
    for (int i = 0; i < 3; i  )
    {
        for (int j = 0; j < 3; j  )
        {
            out << e.matrix[i][j]<<" ";
        }
        out << std::endl;
    }
    out << std::endl;
    return out;
}

and main function

int main
{
int A[3][3] = { {1,1,1},{1,0,0},{0,0,1} };
}

My problem is I don't know how to use in main function my overloaded operator to print matrix A.

CodePudding user response：

I don't know how to use in main function my overloaded operator to print matrix A

First, you need to create an instance of your Matrix class, then you can print it:

int main()
{
    Matrix A = {{{1,1,1}, {1,0,0}, {0,0,1}}};
    std::cout << A;
}

Side note: I suggest replacing all out << std::endl; with out << '\n'; in your operator<<. You should let the user std::flush if the user actually needs it.