how to calculate cpu time

I have a program

clc

if 

%my program

else

disp('timed out')

end

my program consist of taking a snapshot through webcam

now i want to calculate the time,i.e the program must run for only 15 min,after 15 min if snapshot is taken it should be displayed as timed out

Answer 1

[Jan]

You cannot interrupt your program from the outside, but you need to check a flag or value inside the program. Usually this is done in loops like this:

tic;
while toc < 900  % 15 minutes
  takeYourSnapShot;
end

Answer 2

[Matt J]

 See commands tic, toc, etime, now, cputime, etc...

[kash]

I tried but could not get it,kindly asssit

[Matt J]

for example

    T0=cputime;

    for i=1:1e6

      if i==1e6/2

         T=cputime-T0, %The time half way through the loop
         i,
      end

    end

[kash]

where i should insert my program