ctime() Function in C/C++

Last Updated : 26 Jun, 2023

The ctime() function is define in the time.h header file. The ctime() function returns the string representing the localtime based on the argument timer.

Syntax:

char *ctime(const time_t *timer)

Parameters: This function accepts single parameter time_ptr. It is used to set time_t object that contains a time value.

Return Value: This function returns a string that contains the date and time which is in human readable form.

Example:

Www Mmm dd hh:mm:ss yyyy

Time Complexity: O(1)
Auxiliary Space: O(1)

Note: The description of results are given below:

Www: Day of week.
Mmm: Month name.
dd : Day of month.
hh : Hour digit.
mm : Minute digit.
ss : Second digit.
yyyy : Year digit.

Example:

C++

#include <iostream> #include <ctime>   int main() {     // create a time_t object representing 1 hour from now     time_t one_hour_from_now = time(0) + 3600;      // convert one_hour_from_now to string form     char* dt = ctime(&one_hour_from_now);      // print the date and time     std::cout << "One hour from now, the date and time will be: " << dt << std::endl;      return 0; }

// C program to demonstrate // ctime() function. #include <stdio.h> #include <time.h>  int main () {     time_t curtime;          time(&curtime);          printf("Current time = %s", ctime(&curtime));          return(0); }

Output:

One hour from now, the date and time will be: Thu Apr 13 09:01:46 2023

ctime() Function in C/C++

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