Btukfyl

You see my code and please anwser my two questions:

documentclass{article}

usepackage{amsmath,amssymb,mathptmx}

usepackage{pstricks}

usepackage{pst-node}

usepackage{auto-pst-pdf}

begin{document}

begin{pspicture}[showgrid](-3,-3)(8,8)%[linestyle=none]

  psclip{% 

        pscircle(0,0){3}

        pscircle(4,0){3} }

        pscircle[fillcolor=blue,fillstyle=solid](2,3){3}       

  endpsclip

 pscircle(0,0){3}

 pscircle(4,0){3}

 pscircle(2,3){3}

end{pspicture} 

end{document}

The output picture:

Picture 1:

Its code (use TikZ):

documentclass{article}

usepackage{tikz}



begin{document}

begin{tikzpicture}

  fill[blue,even odd rule] (0,0) circle (3) (4,0) circle (3) (2,3) circle (3); 

end{tikzpicture}

My questions:

• How to make my picture like Picture 1? Truly I don't know how to fill color to it.




• (After completing the previous question) Do you see the TikZ code of Picture 1? Look at the important option even odd rule. Do PStricks have the equivalent command, macro,.. as TikZ?

Notice: I prefer PStricks to TikZ but sometimes I recognize the TikZ code is better.

Sorry if I make you being uncomfortable.