c	to run this program on willow enter: f77 test.f, which is the name of this program.	
	x=1.0
        w=4.*x 	
        y=2.0
	z=x+y
c	open statement below creates an output file called 'output'.
	open(6,file='output')
	write(6,100)x,y,z,w
c	write statement writes the values of x,w,y, and z. 
100	format(2x,4f10.2)
	stop
	end