Logo Questions Linux Laravel Mysql Ubuntu Git Menu
HTML CSS JAVASCRIPT SQL PYTHON PHP BOOTSTRAP JAVA JQUERY R React Kotlin
 

find how many seconds past since 1/1/1970

Tags:

c++

I am looking for a function in C++ that calculates how many seconds have past from 1/1/1970 until today.

like image 415
yonatan Avatar asked Nov 16 '10 16:11

yonatan

People also ask

How do you calculate time since 1970?

POSIX defines that you can deduce the number of days since The Epoch (1970-01-01 00:00:00Z) by dividing the timestamp by 86400. This deliberately and consciously ignores leap seconds.

Why is the epoch January 1 1970?

January 1st, 1970 at 00:00:00 UTC is referred to as the Unix epoch. Early Unix engineers picked that date arbitrarily because they needed to set a uniform date for the start of time, and New Year's Day, 1970, seemed most convenient.

What is the time since 1970 called?

The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z).

How do you calculate seconds from dates?

Multiply the two dates' absolute difference by 86400 to get the Epoch Time in seconds – using the example dates above, is 319080600.

1 Answers

#include <time.h>

time_t seconds_past_epoch = time(0);

Available on most operating systems.

like image 125
aschepler Avatar answered Oct 10 '22 08:10

aschepler
Sign in to Comment

Related questions

Comparing two char* for equality [duplicate]
cancel a c++ 11 async task
std::default_random_engine generate values between 0.0 and 1.0
expected ';' at end of declaration /vector /c++
How can I expand call to variadic template base classes?
C++ function returning reference to array
Are non dereferenced iterators past the "one past-the-end" iterator of an array undefined behavior?
QThread vs std::thread
Using the type of the function in std::function to declare multiple functions of that type
Are all of the features of C99 also in C++?
CMakeList set CMAKE_PREFIX_PATH
How to deal with arrays (declared on the stack) in C++?
Date/time conversion: string representation to time_t [closed]
Arduino C++ code: can you use virtual functions and exceptions?
How do I change the background color of a conditional macro in eclipse?
undefined reference to `pthread_mutex_trylock'
How does QDebug() << stuff; add a newline automatically?
What's the difference between C header files (.h) and C++ header files (.hpp)?
C++ typeof operator
How to pass 2-D vector to a function in C++?

Donate For Us

If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!