What is C++ Time function?

In C++, the time( ) function will return the current calendar time as an object of type time_t.
The C++ standard library does not provide a proper data type for date and time it inherits the structs and functions for date and time manipulation from C.
To access the date and time related functions you need to include <ctime> header file. The four types of time are time_t, clock_t, size_t and tm.

The prototype of time( ) is:

time_t time(time_t* arg);

The time( ) function points a pointer to time_t object as its argument and returns the current calendar time as a value of type time_t.

Let us have a look at the example to understand this function:

#include <iostream>

#include <ctime>

using namespace std;

int main() {

   // current date/time based on current system

   time_t current = time(0);

   // convert now to string form

   char* dt = ctime(&current);

   cout << "The local date and time is: " << dt << endl;

   // convert now to tm struct for UTC

   tm *gmtm = gmtime(&current);

   dt = asctime(gmtm);

   cout << "The UTC date and time is:"<< dt << endl;

}

#include <iostream>

#include <ctime>

using namespace std;

int main() {

// current date/time based on current system

time_t current = time(0);

// convert now to string form

char* dt = ctime(&current);

cout << "The local date and time is: " << dt << endl;

// convert now to tm struct for UTC

tm *gmtm = gmtime(&current);

dt = asctime(gmtm);

cout << "The UTC date and time is:"<< dt << endl;

}

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