Hans-Christoph Steiner escribió:
What does printf do? It probably should mimic that behavior.
I think it should mimic sprintf's behaviour to be precise.
I don't know what it is but I dubt it can leave the string (a pointer to
which is passed as parameter) unmodified.
The funny thing is the documentation (if this
http://www.cplusplus.com/reference/clibrary/cstdio/sprintf/ is a
reliable reference) is not very explicit about that.
It says the function can "fail" (which is the only case in which it
would be acceptable "not to output anything"), but does not specify when:
"Return Value
On success, the total number of characters written is returned. This
count does not include the additional null-character automatically
appended at the end of the string.
On failure, a negative number is returned."
There are a few "should be" in the description. If we take those "should
be" as the conditions that determine success or failure, a 0 precision
is not a failure condition, so according to the definition it should
just output a 0-length string.
--
Matteo Sisti Sette
[email protected]
http://www.matteosistisette.com
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