c++ - Convert long int seconds to double precision floating-point value -


i have long int variable wich containes seconds since jan. 1, 1970 in format:

long int seconds = 1231241242144214;

i need convert seconds double precision floating-point value. integer part of value number of days since midnight, 30 december 1899. fractional part of value represents time. .5 equal 12:00 pm.

how can convert?

there 86400 seconds in day, , 25569 days between these epochs. answer is:

double delphidatetime = (unixtime / 86400.0) + 25569;

you need store unix time in integer variable though.


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