[Fortran77] concatenate an integer with a character data type

Is there any way in Fortran77 to concatenate an integer with a character data type?
Basically, I'm trying to create filenames in a loop like:
file01.out
file02.out
file03.out
....
.......
for this I need to concatenate 'file' which is a character with 01 which is an integer, and I cannot simply do file//01, since the data types are different.
Is there a way to get around this issue in Fortran77.
is there any function similar to sprintf in F77.

Please start your own thread.

There is already a thread with this question ... and there is already an answer

At least with F90 you can use write and fmt. I believe it was something like:

WRITE (chars,’(’ // .fmt. n // ’)’) n

(n is integer)

EDIT:
Oh, sorry. I guess I was just a bit too enthusiastic to reply cause I once in my life knew the (partial) answer to something :/ Dang. Perhaps I someday will be the fastest

the concatanation operator "//" deosn't work since one argument is integer, so I wrote a format statement and then write it to a file then read it from the file. seems to be some extra work in opening, writing and then reading it from a file, but it works. I've to write it and then read, since it seems that if u have a format statement, then the only place u can use it is a write statement.
does anyone know of a better way?

Hello? Did you read my answer in your other post?