Implementing rotation function like glRotate

[SummertimeClothes]

I am trying to implement my own rotation function in OpenGL on C++, i.e. something like glRotate. My code for rotating around y looks like this:

    void do_rotateY(GLdouble angle)
    {
    	//rotate around y axis
    	GLdouble s = angle;
    	GLdouble c[4][4];
    	c[1][1] = c[3][3]= 1.0;
    	c[0][0] = c[2][2] = cos(s);
    	c[2][0] = sin(s);
    	c[0][2] = -c[2][0];
    	glMultMatrixd(*c);
    }

When I'm doing a call like:

    glPushMatrix();
    do_rotateY(100);
    ...draw something...
    glPopMatrix();

nothing appears on the screen. When I replace do_rotateY(...) with glRotatef(...) I can see everything correctly.

Thanks for your help!