problem with clock()

[prassaad]

Hello Friends,
I would like to calcute time required by any function
e.g.
start=clock();
scanf("%d",&no);//i enter number & stop for 2 seconds
end=clock()
then i printed 'end -start'
but it gives me answer=0
Guide me for why clock() is not working
I hv FEDORA 6.
Tell me other way to solve my TIME PROBLEM.......

[arne]

Hello Friends,
I would like to calcute time required by any function
e.g.
start=clock();
scanf("%d",&no);//i enter number & stop for 2 seconds
end=clock()
then i printed 'end -start'
but it gives me answer=0
Guide me for why clock() is not working
I hv FEDORA 6.
Tell me other way to solve my TIME PROBLEM.......

I usually use gettimeofday() for timing measurements in C:

#include <sys/time.h>
...
struct timeval s, e;
unsigned long tdiff;
gettimeofday( &s, NULL );
 
/* do your stuff here */
 
gettimeofday( &e, NULL );
tdiff = (e.tv_sec-s.tv_sec) * 1000000+(e.tv_usec-s.tv_usec);
 

HTH,
Arne