Manpage of DYSIZE
DYSIZESection: Linux Programmer's Manual (3)
NAMEdysize - get number of days for a given year
int dysize(int year);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
DESCRIPTIONThe function returns 365 for a normal year and 366 for a leap year. The calculation for leap year is based on:
(year) %4 == 0 && ((year) %100 != 0 || (year) %400 == 0)
The formula is defined in the macro __isleap(year)also found in <time.h>.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
CONFORMING TOThis function occurs in SunOS 4.x.
NOTESThis is a compatibility function only. Don't use it in new programs.
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