大家帮忙看看Fortran中这个错误是什么?怎么改?open(1,file='data.txt')\x09real h,v,a,t,f,v0,g,H0\x09f=0.03\x09t=0.1\x09g=9.8\x09H0=100\x09a=g\x09h=0\x09v=0\x09v0=sqrt(g/f)\x09do while(hv0)then\x09write(*,"(1x,F3.4)") v0\x09else\x09write(*,"(1x,F3.4)") v\x09end if\x09end do\x09end\x09错误如下F:\fortran hui\Text1.for(2) : Error: A specification statement cannot appear in the executable section. real h,v,a,t,f,v0,g,H0--------^Error executing df.exe.

大家帮忙看看Fortran中这个错误是什么?怎么改?
open(1,file='data.txt')
\x09real h,v,a,t,f,v0,g,H0
\x09f=0.03
\x09t=0.1
\x09g=9.8
\x09H0=100
\x09a=g
\x09h=0
\x09v=0
\x09v0=sqrt(g/f)
\x09do while(hv0)then
\x09write(*,"(1x,F3.4)") v0
\x09else
\x09write(*,"(1x,F3.4)") v
\x09end if
\x09end do
\x09end
\x09
错误如下
F:\fortran hui\Text1.for(2) : Error: A specification statement cannot appear in the executable section.
real h,v,a,t,f,v0,g,H0
--------^
Error executing df.exe.