请教FORTRAN中COMMON/w2/ x,y,是定义全局变量吗?
前后文如下：
PROGRAM MAIN
integer N
parameter(N=4)
REAL*8x0,y0,z0,x,y,z,ax,ay,az,vx0,vy0,vz0,epsilon
REAL*8 ax0,ay0,az0
REAL*8 funx,funy,funz,funp
EXTERNALfunx,funy,funz,funp
COMMON/w2/ x,y,z
REAL*8 a,b,c
REAL*8 gamma
COMMON /gamma/ gamma
REAL*8 a1,b1,e0,e,phi0,phi,s1,s2,s3
EXTERNAL midpnt