I wanted to calcualte the execution time of Bubble sort or for that matter any loop . i tried using the clock funtion in c but it gives me 0 seconds for even 10000 elemnts being in the list .

unless you're running a prehistoric computer, 10000 is nothing you want to be thinking in terms of millions if you wish to obtain a calculatable time difference.

But when i include a printf statement in the code the execution time inc to like .4 sec and i guess printf doest take a lot of processing

>i guess printf doest take a lot of processing
printf doesn't do much internal processing, despite the length of the code for it. The performance hits come from writing to an external device, which is extremely slow when compared to the simple internal data movement of a sort.

but isnt the clock is supposed to be processor clock and i think it doesnt take into account the interupts for other device into account

correct me if i am wrong ..... i am new to this

ooppss... almost forgot to say thnx to all those who replied :cheesy:

>but isnt the clock is supposed to be processor clock and i think
>it doesnt take into account the interupts for other device into account
The processor doesn't stop ticking just because you call an interrupt for a device.

i meant that clock function only count processor clocks

>i meant that clock function only count processor clocks
And what do you think the processor is doing while the device is doing its thing?

There is something like in a C code snippet here:
http://www.daniweb.com/code/snippet377.html