c ++ sending to command line

I'm trying to use opnecv to track a red ball and print the x and y coordinates on the command line (I'm pretty new to c ++ so I do not know if there's any better place for it) I tried doing this like this:

            //calcular a posição da bolinha
        int posX = dM10 / dArea;
        int posY = dM01 / dArea;

        if (iLastX >= 0 && iLastY >= 0 && posX >= 0 && posY >= 0)
        {
            //Desenhar uma linha entre o ponto anterior e o ponto novo
            line(imgLines, Point(posX, posY), Point(iLastX, iLastY), Scalar(255, 0, 0), 2);
        }

        iLastX = posX;
        iLastY = posY;
    }

    imshow("Thresholded Image", imgThresholded); //mostrar a imagem modificada

    imgOriginal = imgOriginal + imgLines;
    imshow("Original", imgOriginal); // mostrar a imagem original

    {
        string strMytestString("Point(posX, posY)\n");//imprimir na linha de comando
        cout << strMytestString;
    }

But it did not work, does anyone know why?