[lug] OT: My own C/C++ mix Q

[D. Stimits]

Ok, I have some legacy C (and you thought C didn't have
inheritance...heheh) being compiled under g++. One of the legacy code
snippets uses strftime(), and all it is used for is to format the year.
This warning always generates:
  warning: `%c' yields only last 2 digits of 
  year in some locales

Does anyone know if there is a newer method of formatting time and
getting year out of "struct tm", the underlying struct producing the
unformatted time data, such that it does not issue this warning (and I
won't turn off warnings, I am looking to see if there was something new
created to deal with that locale warning)?

Second, on sscanf() and sprintf(), a %lu can be used for an unsigned
long format. I *think* %llu is good for the 64 bit unsigned long long,
or at least the warnings go away (this is on g++ RH 7.1). Is %llu the
correct format string for 64 bit unsigned longs (my references are too
old to even know about long long)?

D. Stimits, stimits at idcomm.com