C Language Time Processing

First, Introduction

Time processing is often encountered in programming, including program run time and display time. In standard C, date and time processing is included in the header file of time.h and requires the use of a date-and-time-related type of function, which requires import of time.h.

Second, the API

http://www.cnblogs.com/chenqiangjsj/archive/2011/04/06/2007054.html

Third, examples

1. Calculate the time difference

Reference:

http://www.cnblogs.com/fengbohello/p/4153831.html

#include <stdio.h>#include<sys/time.h>#include<unistd.h>intMain () {structtimeval start, end; unsignedLongSpend_time; Gettimeofday (&start, NULL); printf ("Start:%d.%d\n", Start.tv_sec, start.tv_usec); Sleep (1); Gettimeofday (&end, NULL); printf ("End:%d.%d\n", End.tv_sec, end.tv_usec); //microsecond Time DifferenceSpend_time=1000000* (END.TV_SEC-START.TV_SEC) + (end.tv_usec-start.tv_usec); printf ("%ld\n", Spend_time); return 0;}

Compile

gcc  -g-o Time_diff TIME_DIFF.C

Run

C Language Time Processing