How can I track how long something takes to do with .000 percision? I know how to access time (NULL); but that is only accurate up to seconds and if execution takes .8 seconds it just tells me 0. Time (NULL) returns an integer not a double. Anyone know how to time something? Heres how I have it now.
#include <time.h>
#include <iostream.h>
int main () {
int pretime = time (NULL);
//stuff is done here
int posttime = time (NULL);
cout << "that took " << posttime - pretime << " seconds.";
}
This does work but it is only accurate to the second and not to the 1/1000th of a second like I would like. I need help badly!
#include <time.h>
#include <iostream.h>
int main () {
int pretime = time (NULL);
//stuff is done here
int posttime = time (NULL);
cout << "that took " << posttime - pretime << " seconds.";
}
This does work but it is only accurate to the second and not to the 1/1000th of a second like I would like. I need help badly!
Mostly Java and some C/C++. Used to use ASM, but its not really worth it these days unless you are doing device drivers and other lower level stuff. I'm also a tutor at NC State University. Well as for your problem you could maybe check the accuracy then decide if the program needs to loop or not. If you are doing numbers from 1-10000 then you are prolly safe just running once, but if you are doing 1-10 then you are going to need to loop a couple hundred times at least. I dont know what to tell ya about the program ya saw with the very high time accuracy, I've seen people write timers in ASM, but they are not even very reliable because they count on the computer running each one as 1 instruction code and then using that time based on the computers computational time to create the timer. With today's instruction set optimizations this approach is less feasible.
