how can I change the timestamp while creating a binary/text file in C ? I have used Windows API but that is little slow.

Question

I am creating 500 binary files with one minute old time stamp. I am using windows API but it's very slow, so how can I improve the performance.

Answer 1

Assume your machine is Linux the you have following option -

$ touch -t [[CC]YY]MMDDhhmm[.SS]

CC – Specifies the first two digits of the year
YY – Specifies the last two digits of the year. 
MM – Specifies the month
DD – Specifies the date
hh – Specifies the hour
mm – Specifies the minute
SS – Specifies the seconds
For example:

$ touch -a -m -t **********.09 <yourfile>

So you can call the above command from the system statement in the C.

Now coming to the windows, in Windows you have following two API for the same purpose -
GetFileTime
SetFileTime

Let me know if you still have some issue.