How to

[Code Apperentice]

How do you delay a program before moving on, here is my code

#include <iostream>
#include <fstream>

using namespace std;

int main( int argc, char* argv[] )
{
	ofstream outFile( "Results.txt" );

	int x = 0, y = 0, m = 0;
cout << "Hello, this program will find the multiples of x below y" << endl;
system("pause");
cout << "Please enter the value of x: " ;
cin >> x;
cout << "Please enter the value of y: " ;
cin >> m;
cout << "Now the computer will find all the multiples of x below y and will write it into a file" << endl;
system("pause");
fopen("Results.txt","r+");
while(y <= m)
{
y += x;
cout << y << endl;

  
    outFile << y << endl;
    
 
}
outFile.close();
return 0;
}

I want to delay it here

cout << "Now the computer will find all the multiples of x below y and will write it into a file" << endl;
system("pause");

I want to replace the system("pause") into a 5 second delay

[3qX21hU5]

Are you on a windows or *Nix system? Because #include <windows.h> with Sleep(milliseconds) in Windows or #include <unistd.h> with sleep(milliseconds) in Unix is what I think you are looking for.


For example on windows this works

// Waits 10 seconds before printing hello
#include <iostream>
#include <windows.h>

using namespace std;

int main()
{
    Sleep(10000);
    cout << "Hello" << endl;
}

Not to sure about the *Nix header since I never use it so if i'm wrong please correct me.

[Code Apperentice]

Windows

[MrHutch]

A very quickly written, system independent version.

#include <iostream>
#include <ctime>

void Delay( const unsigned int secs )
{
  const clock_t start = clock();
  clock_t end = clock();

  while( ( end - start )/CLOCKS_PER_SEC < secs )
  {
    end = clock();
  }
}

int main( int argc, char* argv[] )
{
  Delay( 5 );

  std::cout << "5 seconds have passed";
}

[Code Apperentice]

thx

[3qX21hU5]

Hutches version is much better if you have the need to be system independent (Which you should be in almost all release software) but if you are just doing a assignment that only calls for windows you can use the sleep function.

[ne555]

iHutch105 version does polling, it will fry your processor.
iirc, `clock()' does not measure wall time, but user time.

By the way, `sleep()' takes the amount of seconds.

[3qX21hU5]

By the way, `sleep()' takes the amount of seconds.

No it doesn't, at least not on windows. Not sure about *Nix, but I know it takes ms on windows

VOID WINAPI Sleep(
  _In_  DWORD dwMilliseconds
);

http://msdn.microsoft.com/en-us/library/windows/desktop/ms686298(v=vs.85).aspx

[MrHutch]

ne555 wrote:

iHutch105 version does polling, it will fry your processor.

Yes, it polls. I wouldn't advising using it for a bigger scale project but it shouldn't matter all that much given the OP's original code. "Fry" is a strong term. ;-)

Unsure on the user vs. wall clock. I'll have to look into that when I get more time.

[ne555]

@Zereo: c++ is case sensitive.

[3qX21hU5]

Doh sorry about that ;p