checking if time is in specific interval in C++ ?

Question

I need to generate values according to time of the day, is there a neat way to accomplish that ?

from 9-12 value should be between x - y

from 6-9 value should be between a - b

is there any other way than getting timeinfo struct and extracting hour out of it?

Answer 1

You should take a look at boost::posix_time.

using namespace boost::posix_time;
using namespace boost::gregorian;

ptime now = second_clock::local_time();

// You can compare now with other ptime values
ptime nine_o_clock = day_clock::local_day() + hours(9);
ptime twelve_o_clock = day_clock::local_day() + hours(12);

if ((now >= nine_o_clock) && (now < twelve_o_clock))
{
  // Do what you want.
}