RE: [Dev-C++] System specific?

[Ioannis V. <no...@ho...>]

clock_t clock(void); It returns the processor time that the program has
spent so far from the beginning of its execution.

 clock()/CLOCKS_PER_SEC is that time in seconds (integer).

#include <iostream>
#include <ctime>

void useless()
{
  for(int i=0; i<1024*1024*1024; i++)
     ;
}     



int main()
{
  using namespace std;

  clock_t t1, t2;

  for(int i=0; i<100*1024*1024; i++)
     ;

  t1=clock();
  
  cout<<"Time passed since the beginning of the program :"<<t1<<endl;
  cout<<"In seconds: "<< t1/CLOCKS_PER_SEC<<endl;
  
  t1=clock();
  
  useless();
  
  t2=clock();
  
  cout<<"\nuseless() took "<<t2-t1<<" to complete\n";
  cout<<"In seconds: "<<(t2-t1)/CLOCKS_PER_SEC<<endl;
}  
  
  


Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
* Alternative URL: http://run.to/noicys


> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Christian Faulhammer
> Sent: Monday, May 13, 2002 10:23 PM
> To: dev...@li...
> Subject: [Dev-C++] System specific?
> 
> 
> Hi Ioannis,
> 
> > For portable code use the functions provided in time.h . 
> There is much
> > useful stuff in there.
>  Good idea....if I could understand how to use it. The 
> original function
> has been given to us by our teacher as a help...it's for 
> three weeks now
> that I am in contact with C++. This routine should return a time (no
> matter which, but in seconds would be great), so I can 
> measure the time
> passed from start to end of the task given to the user. Is there a
> portable solution or does the original function only work with gcc
> greater than 2.95.3 (perhaps gcc 3.x)?
> In the code I use MyTime as follows:
> 
> ----------------------------8< schnipp------------------------------
> start=MyTime();
> [task]
> end=MyTime();
> complete=(end - start) + (10 * penaltycounter);
> ----------------------------schnapp >8------------------------------
> 
> You understand what I want? ;)
> 
> Chau
> 
> V-Li
> 
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