Thread: Programs in C

Timing programs in C

I am learning C programming language. I am trying to use the functions get usage or times, or the time command to time my programs. But I am not getting the accurate results for that. Does anybody know how to use Timing programs in C.?? Any help would be highly appreciated.

1)I think that you should learn something basic about the timings that are used in the program. Uses of time functions include:

1. Time program and function.

2. Telling the time.

3. Setting number seeds.

Basic time functions are prototypes in this manner:

time_t time (time_t *tloc)
this command will return the time since 00:00:00 GMT, Jan. 1, 1970,

2) I am given that you the simple program that shows s that calling the time function at different moments.

/* timer.c */
#include <stdio.h>
#include <sys/types.h>
#include <time.h>
main()
{ int i;
time_t t1,t2;

(void) time(&t1);
for (i=1;i<=250;++i)
printf(``%d %d %d\n'',i, i*i, i*i*i);
(void) time(&t2);
printf(``\n Time to do 250 squares and
cubes= %d seconds\n'', (int) t2-t1);
}