C Program to get system current date and time on linux (Fedora / CentOS / RHEL)

C Program to get system date and time on linux (Fedora / CentOS / RHEL)

This

C Program to get current system current date and time using localtime function.

#include<stdio.h>                                                                
#include<time.h>                                                            
                                                                                
void main()                                                                     
{                                                                               
  time_t t = time(NULL);                                                        
  struct tm time = *localtime(&t);                                              
                                                                                
  printf("date - %d:%d:%d\n", time.tm_mday,  time.tm_mon + 1, time.tm_year + 1900);
  printf("time- %d:%d %d\n", time.tm_hour, time.tm_min, time.tm_sec);           
}                                                                                   
Output:
$ cc system-time.c
$ ./a.out 
date - 12:3:2018
time- 21:51 50

C Program to get date and time as string on linux

This c program is to get the system current date and time as string using ctime function.

#include<stdio.h>                                                                
#include<time.h>                                                             
                                                                                
void main()                                                                     
{                                                                               
  char* time_now;                                                               
  time_t t = time(NULL);                                                        
  time_now = ctime(&t);                                                         
                                                                                
  printf("date and time now: %s", time_now);                                    
}   
Output:
$ cc system-time.c
$ ./a.out 
current time: Tue Mar 12 22:00:56 2018



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