求助思路（Fortran函数）

Qilin

彭国伦书上有一个程序可以给文件的每一行添加行号，可供你参考，程序如下：

[Fortran] 纯文本查看 复制代码

program ex0909
implicit none
integer,parameter :: inputfileid=10,outputfileid=11
integer,parameter :: maxbuffer=200
character(len=80) :: inputfile,outputfile
character(len=maxbuffer) buffer
integer count
integer error
logical alive

write(*,*) "Input Filename: "
read(*,"(A80)") inputfile
write(*,*) "Output Filename: "
read(*,"(A80)") outputfile

inquire(file=inputfile,exist=alive)
if(.not. alive) then
    write(*,*) trim(inputfile), " doesn't exist."
    stop
end if

open(unit=inputfileid,file=inputfile,status="old")
open(unit=outputfileid,file=outputfile,status="replace")
count=1
do while(.true.)
    read(inputfileid,"(A200)",iostat=error) buffer
    if(error/=0) exit
    write(outputfileid,"(I3,'. ',A)") count,trim(buffer)
    count=count+1
end do
close(inputfileid)
close(outputfileid)
pause
stop
end program ex0909