calculating run time of program in virtual machine

Question

I'm using below code to get the total time of my program.

clock_t start=clock();
//doing some work
clock_t end=clock();
printf("%f \n",(double)(end-start)/(double)CLOCKS_PER_SEC);

I'm running my program in virtual machine. It always shows me 0.000000! Do you know why? Is it because of VM?

score 1 · Accepted Answer · edited May 23 '17 at 12:05

1

You were trying to print using an integer format specifier with a double value.

Try:

printf("%f \n",(double)(end-start)/(double)CLOCKS_PER_SEC);

EDIT: Just found this answer that should fix your problem.

edited May 23 '17 at 12:05

Community

answered Jul 31 '13 at 00:02

Aaron Cronin

Sorry it was %f which prints double. Typo here. – Sara Jul 31 '13 at 00:03
1

Can you print `start` and `stop` separately to check if they are in fact the same value? – Aaron Cronin Jul 31 '13 at 00:04
Have updated answer with link to fix. – Aaron Cronin Jul 31 '13 at 00:06

1 Answers1