file io - Non-advancing read in Fortran with free format -

file io - Non-advancing read in Fortran with free format -

i want read line in file, includes 3 real numbers, without advancing pointer. wrote: (txt variable representing file has value of 80)

read(txt, *, advance='no') (numbers(i),i=1,3)

however, got error message saying:

"error #6568: utilize of advance, size, or eor specifier invalid."

so how should write create correct?

thanks.

you can utilize advance='no' explicit format. reason next : advance='no' avoids go next record (notice file pointer advances anyway, after lastly read value); directed list (format *), 1 doesn't know how many record involved read statement (the 3 numbers may written on 4 lines instance).

file-io fortran fortran90 fortran77