source:     XRSver1sample2D.o
	    gcc XRSver1sample2D.o -lg++ -o XRSver1sample2D -lX11 -lm
source.o:   XRSver1sample2D.C
	    gcc -c XRSver1sample2D.C

uxp:	    XRSver1sample2D.o
	    gcc XRSver1sample2D.o -lg++ -o XRSver1sample2D -lX11 -lsocket -lnsl -lm 

		1) random -> rand
		2) XEvent at xcommand and w at boundary_condition
















