One approach to creating an ISO 8601 datetime format in C++ is to use the std::put_time function that is part of the C++ Standard Library. Here is an example code snippet that demonstrates this approach:
#include <iostream>
#include <iomanip>
#include <chrono>
int main() {
std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
std::time_t time = std::chrono::system_clock::to_time_t(now);
struct tm local_tm;
localtime_s(&local_tm, &time);
char buffer[50];
std::strftime(buffer, sizeof(buffer), "%Y-%m-%dT%H:%M:%S%z", &local_tm);
std::cout << buffer << std::endl;
return 0;
}
In this example, we first create a system_clock::time_point
object representing the current time, and then convert it to a time_t
object. We use the localtime_s
function to get the local time as a tm
struct, which we then pass to the strftime
function to format it according to the ISO 8601 standard. Finally, we print the resulting string to the console.
Note that the %z
format specifier in the strftime
call gives the timezone offset in the format of +HHMM or -HHMM, depending on whether it is east or west of GMT. This is not strictly required for ISO 8601, but is a common convention.
There are other ways to achieve the same result, such as using libraries like Boost or strftime.net, or manually formatting the string using string manipulation operations.
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2021-07-30 11:00:00 +0000
Seen: 7 times
Last updated: May 08 '22
What does an empty name signify in the inotify_event structure in the C++ language?
What is the method to get a printable output of a C++11 time_point?
What are the differences between TREEFROG, CROW, and the CPPCMS C++ framework?
How can the NTP flag be set for Linux time in C++?
What is the process of redefining a c++ macro with fewer parameters?
What are some other options instead of Scipy to compute CubicSpline?
How can a list be sorted alphabetically within a console application?