CODEWITHSUNDEEP
c
MaMu
MaMu

Reputation: 1869

Substracting a substring

I'm trying to subtract a substring from params->filename and append it to query. I would prefer to avoid extra copying it (params->filename won't change after i exec sprintf , isin't it)? This is what I tried:

(gdb) print params->filename
$4 = 0x8b7d53 "20140317.080051.std"
....
sprintf (query+strlen(query), " %.*s ', to_date('YYYYMMDD.HHMISS')", 0, params->filename+ 15);

It doesn't attach anything. Any clue?

Upvotes: 0

Views: 59

Answers (1)

M.M
M.M

Reputation: 141554

With %.*s, the argument corresponding to * means the number of characters to write. You gave argument 0 so it writes 0 characters.

To fix this, either change the 0 to a positive number, or if you want to write the remainder of the string you can just omit the .* and the 0,.

Upvotes: 3

Related Questions