Help, how to distill date from time_t value?

bbebfe · 11-13-2008, 03:15 AM

This is my code below:

Code:

time_t now = time(NULL);
printf("%s\n", ctime(&now));

Its output is something like "Sat Dec 18 12:38:38 1971". I only want the date portion to be outputted, i.e. Dec 18 1971. Can anybody help me!

Any help is appreciated!

matsp · 11-13-2008, 03:18 AM

strftime will take a struct tm and a format string (like printf sort of), which you can get by calling localtime or gmtime.

Or you could just use sprintf() with the data in struct tm, since it gives you year, month, day, etc.

--
Mats

bbebfe · 11-13-2008, 04:20 AM

Thank you so much!
I put my code here to help others who need this two.

Code:

	char date_buff[40];
	time_t time_value = time(NULL);
	struct tm* my_tm = localtime(&time_value);
	strftime(date_buff, sizeof(date_buff), "%b %d,%Y\n", my_tm); 
	printf("%s\n", date_buff);

NOTE: The returned pointer from localtime is a static variable, that means it might be overwritten by subsequent calls to ctime, gmtime, or localtime.

11-13-2008, 03:15 AM	#1
bbebfe Why bbebfe is not bbebfe? Join Date: Nov 2008 Location: Earth Posts: 27	Help, how to distill date from time_t value? This is my code below: Code: time_t now = time(NULL); printf("%s\n", ctime(&now)); Its output is something like "Sat Dec 18 12:38:38 1971". I only want the date portion to be outputted, i.e. Dec 18 1971. Can anybody help me! Any help is appreciated!
bbebfe is offline

11-13-2008, 03:18 AM	#2
matsp Kernel hacker Join Date: Jul 2007 Location: Farncombe, Surrey, England Posts: 15,686	strftime will take a struct tm and a format string (like printf sort of), which you can get by calling localtime or gmtime. Or you could just use sprintf() with the data in struct tm, since it gives you year, month, day, etc. -- Mats __________________ Compilers can produce warnings - make the compiler programmers happy: Use them! Please don't PM me for help - and no, I don't do help over instant messengers.
matsp is offline

11-13-2008, 04:20 AM	#3
bbebfe Why bbebfe is not bbebfe? Join Date: Nov 2008 Location: Earth Posts: 27	Thank you so much! I put my code here to help others who need this two. Code: char date_buff[40]; time_t time_value = time(NULL); struct tm* my_tm = localtime(&time_value); strftime(date_buff, sizeof(date_buff), "%b %d,%Y\n", my_tm); printf("%s\n", date_buff); NOTE: The returned pointer from localtime is a static variable, that means it might be overwritten by subsequent calls to ctime, gmtime, or localtime.
bbebfe is offline

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