How to get current time and date in C++?

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Is there a cross-platform way to get the current date and time in C++?

In C++ 11 you can use std::chrono::system_clock::now()

Example (copied from en.cppreference.com):

#include <iostream>
#include <chrono>
#include <ctime>    

int main()
{
    auto start = std::chrono::system_clock::now();
    // Some computation here
    auto end = std::chrono::system_clock::now();

    std::chrono::duration<double> elapsed_seconds = end-start;
    std::time_t end_time = std::chrono::system_clock::to_time_t(end);

    std::cout << "finished computation at " << std::ctime(&end_time)
              << "elapsed time: " << elapsed_seconds.count() << "s\n";
}

This should print something like this:

finished computation at Mon Oct  2 00:59:08 2017
elapsed time: 1.88232s

C program to Display Current Date and Time, The C library function char *ctime(const time_t *timer) returns a string representing the localtime based on the argument timer. The returned string has the following format: Www Mmm dd hh:mm:ss yyyy. Here Www is the weekday, Mmm the month in letters, dd the day of the month, hh:mm:ss the time and yyyy the year. C Program to Display the current Date and Time The C library function char *ctime(const time_t *timer) returns a string representing the localtime based on the argument timer . The returned string has the following format: Www Mmm dd hh:mm:ss yyyy .

C++ shares its date/time functions with C. The tm structure is probably the easiest for a C++ programmer to work with - the following prints today's date:

#include <ctime>
#include <iostream>

int main() {
    std::time_t t = std::time(0);   // get time now
    std::tm* now = std::localtime(&t);
    std::cout << (now->tm_year + 1900) << '-' 
         << (now->tm_mon + 1) << '-'
         <<  now->tm_mday
         << "\n";
}

Print current date and time in C, h header file contains definitions of functions to get and manipulate date and time information. The following C source code prints the current date� This function is used to get the CPU time: clock() This function is used to get current system time: time() This function is used to get current system time as structure: difftime() This function is used to get the difference between two given times: strftime() This function is used to modify the actual time format: mktime()

You can try the following cross-platform code to get current date/time:

#include <iostream>
#include <string>
#include <stdio.h>
#include <time.h>

// Get current date/time, format is YYYY-MM-DD.HH:mm:ss
const std::string currentDateTime() {
    time_t     now = time(0);
    struct tm  tstruct;
    char       buf[80];
    tstruct = *localtime(&now);
    // Visit http://en.cppreference.com/w/cpp/chrono/c/strftime
    // for more information about date/time format
    strftime(buf, sizeof(buf), "%Y-%m-%d.%X", &tstruct);

    return buf;
}

int main() {
    std::cout << "currentDateTime()=" << currentDateTime() << std::endl;
    getchar();  // wait for keyboard input
}

Output:

currentDateTime()=2012-05-06.21:47:59

Please visit here for more information about date/time format

C date and time functions, C Date Time tutorial shows how to work with date and time in C. This tutorial uses C99. const struct timespec *) — sets the current time of a clock specified In the example, we get the Unix time and convert it into the local� Print current date and time in C. Write a C program to print current date and time in standard output. We know that time.h header file contains definitions of functions to get and manipulate date and time information.

std C libraries provide time(). This is seconds from the epoch and can be converted to date and H:M:S using standard C functions. Boost also has a time/date library that you can check.

time_t  timev;
time(&timev);

C Date time tutorial, struct date dt;. // This function is used to get. // system's current date. getdate(&dt);. printf ( "System's current date\n" );. printf ( "%d/%d/%d" ,. The “tm” Structure The header <ctime> has four time-related types: tm, clock_t, time_t, and size_t. Each of the types, clock_t, size_t, and time_t represent the system time and date as an integer. The structure tm holds the date and time in the form of a C structure.

the C++ standard library does not provide a proper date type. C++ inherits the structs and functions for date and time manipulation from C, along with a couple of date/time input and output functions that take into account localization.

// Current date/time based on current system
time_t now = time(0);

// Convert now to tm struct for local timezone
tm* localtm = localtime(&now);
cout << "The local date and time is: " << asctime(localtm) << endl;

// Convert now to tm struct for UTC
tm* gmtm = gmtime(&now);
if (gmtm != NULL) {
cout << "The UTC date and time is: " << asctime(gmtm) << endl;
}
else {
cerr << "Failed to get the UTC date and time" << endl;
return EXIT_FAILURE;
}

getdate() and setdate() function in C with Examples, This program will get the current system date and time in Linux operating system using GCC or G++ compiler. System local time can be extracted by using struct� Current Date And Time In C#. In this blog, you will learn, how to show the current date and time in C#. Step 1. Open Visual Studio. Step 2. Click Console Application and click OK button. Step 3. Type the program to see the current date and time in the program list. DateTime now = DateTime.Now;

C program to get current system date and time in Linux, setdate(), This function used to modify the system date. getdate(), This function is used to get the CPU time. clock(), This function is used to get� To access date and time related functions and structures, you would need to include <ctime> header file in your C++ program. There are four time-related types: clock_t, time_t, size_t, and tm. The types - clock_t, size_t and time_t are capable of representing the system time and date as some sort of integer. The structure type tm holds the date and time in the form of a C structure having the following elements −.

C time functions, To get a human-readable version of the current local time you can use the ctime() function. The function returns a C string containing the date� I think you need separately date parts like (day, Month, Year) DateTime today = DateTime.Today; Will not work for your case. You can get date separately so you don't need variable today to be as a DateTimeType, so lets just give today variable int Type because the day is only int.

How to use Time and Date in C � CodingUnit Programming Tutorials, Here is an example to get current date and time in C++ language,Example Live Demo#include using namespace std; int main() { time_t now� In today’s C programming language tutorial we take a look at how to use time and date from C programs. To make use of time and date function you need to include the time.h header file from the standard C library. This header file contains functions and macros that provide standardized access to time and date. It also contains functions to manipulate and format the time and date output.

Comments
  • If Ockonal is still active, he should change the accepted answer to the C++11 approach. This question still seems to get a lot of views.
  • C version: stackoverflow.com/questions/1442116/…
  • @JSQuareD Even looking at this question now after all this time, I find the C approach better using the tm structure. Doesn't the C++11 approach just give the unix timestamp (time since epoch) although the question was about getting the date and time?
  • Wow, this question has 1,110,886 views! People really love C++!
  • This should be upvoted because it's the most portable and easy way in current C++.
  • @Johannes, just added mine. At this rate, this should be the top answer by 15 August 2017, 16:31 UTC :-)
  • This answer is of very little use without examples of using the obtained value. E.g. how can you print it, get local time, compare with other date/time?
  • This is the worst answer possible. It makes other c++11 answers a duplicate, and yet it explains nothing, being a 'link only'.
  • There's no way to get more to the point than this answer. The OP was asking "Is there a cross-platform way to get the current date and time in C++?" This question gives you exactly this. If you are in doubt about how to get a string from stream, or how to properly format a time_point<>, go ahead and ask another question or google after it.
  • Use ctime() together with this answer if you want a date string.
  • what about deleting the instance of struct tm is it possible to just call delete on it?
  • @Petr you only need to call delete on memory allocated with new.
  • ok but still you get a pointer from localtime() so the structure instance gets allocated on heap or not? which means it doesn't get cleaned unless you do that somehow. I never said use delete (c++ keyword) on it, I just thought it should be deleted somehow :) or who is going to do that for you?