Reading Tab Separated Files

From: Alan Ross (alan_at_rebeluk.com)
Date: 10/24/04 

Date: 24 Oct 2004 09:29:51 -0700

Dear All,

I am currently learning Fortran and am stuck on a problem. I have
scoured the web and this group for a solution but to no avail.
Hopefully someone would be able to point me in the right direction.

I am attempting to read in a formatted file of integer values
separated by tabs. There are three values per line. eg.

    180 807 479
    27 785 88
    145 50 429
    317 5 805
    131 77 402

I am attempting to use the following code:

    integer :: i1, i2, i3
    open(unit = 10, file = "list.dat", form = "formatted", action =
"read")
    do
        read(10, *) i1, i2, i3
        write(*,*) i1, i2, i3
    end do
    close(10)

According to the postings in this group, the free form format * should
recognise the tabs as separating the integers (btw. I am using NAGware
F95 compiler). I get the error message "Invalid input for integer
editing"

I also experimented with format statements namely fmt="(i3, t5, i3,
t9, i3)" but since the number of integer characters before the tab
varies, I have problems. So it only outputs the first line and ignores
the rest.

Could anyone please help push me in the right direction. I have spent
days on this problem now.

Thanks,

Alan

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