C++ || Snippet – How To Display The Current System Time & Date In C++

February 23, 2012 admin 1 Comment

This page consists of a simple program which demonstrates the process of displaying the current system time and date in C++.

This program utilizes the use of a “struct” data structure to obtain the necessary information to display the current system date and time. Knowledge of how this process works would be beneficial, but is not necessary. Click here for more information on how structs work.





		
		
			Display The Current Date/Time
			
C++
			
			// ============================================================================
//    Author: Kenneth Perkins
//    Date:   Feb 23, 2012
//    Updated: Feb 6, 2021
//    Taken From: http://programmingnotes.org/
//    File:  program.cpp
//    Description: Demonstrates how to display the current system time
// ============================================================================
#include <iostream>
#include <ctime>  // used for time
#include <iomanip> // used for setw

std::tm getLocalTime(std::time_t timer);

int main() {
    // variable declaration for the current time
    auto now = getLocalTime(std::time(0));

    // display the current date in MM/DD/YYYY format
    std::cout << "Today's Date is: "
        << (now.tm_mon + 1) << "/"
        << (now.tm_mday) << "/"
        << (now.tm_year + 1900)
        << std::endl;

    // display the current system time in HH:MM:SS, AM/PM format
    std::cout << "\nThe current system time is: ";

    // display the hours
    if (now.tm_hour == 0) {
        std::cout << 12;
    } else {
        std::cout << now.tm_hour % 12;
    }

    std::cout << ":";

    // display the current mins/secs
    std::cout.fill('0');
    std::cout << std::setw(2)
        << (now.tm_min) << ":"
        << std::setw(2)
        << (now.tm_sec);

    // display AM/PM
    if (now.tm_hour >= 12) {
        std::cout << " PM";
    } else {
        std::cout << " AM";
    }
    std::cout << std::endl;

    std::cin.get();
    return 0;
}// end of main

std::tm getLocalTime(std::time_t timer) {
    std::tm bt{};
#if defined(_MSC_VER)
    localtime_s(&bt, &timer);
#else
    localtime_r(&timer, &bt);
#endif
    return bt;
}// http://programmingnotes.org/
			
				
					
				
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						// ============================================================================
//    Author: Kenneth Perkins
//    Date:   Feb 23, 2012
//    Updated: Feb 6, 2021
//    Taken From: http://programmingnotes.org/
//    File:  program.cpp
//    Description: Demonstrates how to display the current system time
// ============================================================================
#include <iostream>
#include <ctime>  // used for time
#include <iomanip> // used for setw
 
std::tm getLocalTime(std::time_t timer);
 
int main() {
    // variable declaration for the current time
    auto now = getLocalTime(std::time(0));
 
    // display the current date in MM/DD/YYYY format
    std::cout << "Today's Date is: "
        << (now.tm_mon + 1) << "/"
        << (now.tm_mday) << "/"
        << (now.tm_year + 1900)
        << std::endl;
 
    // display the current system time in HH:MM:SS, AM/PM format
    std::cout << "\nThe current system time is: ";
 
    // display the hours
    if (now.tm_hour == 0) {
        std::cout << 12;
    } else {
        std::cout << now.tm_hour % 12;
    }
 
    std::cout << ":";
 
    // display the current mins/secs
    std::cout.fill('0');
    std::cout << std::setw(2)
        << (now.tm_min) << ":"
        << std::setw(2)
        << (now.tm_sec);
 
    // display AM/PM
    if (now.tm_hour >= 12) {
        std::cout << " PM";
    } else {
        std::cout << " AM";
    }
    std::cout << std::endl;
 
    std::cin.get();
    return 0;
}// end of main
 
std::tm getLocalTime(std::time_t timer) {
    std::tm bt{};
#if defined(_MSC_VER)
    localtime_s(&bt, &timer);
#else
    localtime_r(&timer, &bt);
#endif
    return bt;
}// http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output

Today's Date is: 2/23/2012
The current system time is: 1:05:43 PM

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Posted in: Advanced, C++, C++, Snippets Tags: time

One Response to C++ || Snippet – How To Display The Current System Time & Date In C++

laxmikant says:

June 28, 2012 at 4:11 am

thanks for sharing.
useful information

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C++ || Snippet – How To Display The Current System Time & Date In C++

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