.dat file corresponding to iteration

lizhihua

Hi, I am now doing the post processing of the intake/exhaust strokes of a engine(model setup with star and es-ice),and in order to better understand the case, I am planning to obtain the value of a certain scalar at every iteration,using "ofile casename.dat" and a loop. I thought the casename would change with different iteration but in fact the integer that I set was recognized as a string of characters and never changed. How can I generate .dat files with names corresponding to the iterations in a loop? Thanks in advance!