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Help Output window disappears instantly !!!!

  #1  
Feb 2nd, 2008
When I compile and run my programs in Dev C++, the output window opens and shows the output. Then instanlty the window flashes and disappears.

How do I make the window stay long enough for me to read the output??

Thanks
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Re: Output window disappears instantly !!!!

  #2  
Feb 2nd, 2008
The problem is (not really a problem), that the program is running too fast and doesn't have anything to stop it from closing. There are a number of options to solve this, most of them are mentioned here -- http://faq.cprogramming.com/cgi-bin/...&id=1043284385 so if you're using C++ throw a cin.ignore(); and cin.get(); before you return 0; at the end of your program
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Re: Output window disappears instantly !!!!

  #3  
Feb 2nd, 2008
here at home i'm using dev c++ and i do get the same "problem"

i use system("pause") which i think is not preferred by others,but it's just me using it to see the output
then i just remove it when i'm at school because there we use visual c++

OR

run the program with the command prompt
Last edited by carnage : Feb 2nd, 2008 at 8:00 am.
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Re: Output window disappears instantly !!!!

  #4  
Feb 2nd, 2008
use getch in the end....
though getch is used to input.

cout<<"c++ is cool"<<endl;
getch(); // freezez the screen till a key is pressed.
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Re: Output window disappears instantly !!!!

  #5  
Feb 2nd, 2008
Don't use
  • getch()
  • system("PAUSE")

Both are non-portable.

Instead, do it the C++ way:
Help with Code Tags
C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. #include <limits>
  3.  
  4. void pause() {
  5.   std::cout << "Press ENTER to continue... ";
  6.   std::cin.ignore( std::numeric_limits<streamsize>::max(), '\n' );
  7.   }

Now if you want to pause, just use the function:
Help with Code Tags
C++ Syntax (Toggle Plain Text) 
  1. int main() {
  2.   using namespace std;
  3.   string name, color;
  4.  
  5.   cout << "WHAT, is your NAME!?\n";
  6.   getline( cin, name );
  7.  
  8.   cout << "WHAT, is your favorite COLOR!?\n";
  9.   getline( cin, color );
  10.  
  11.   cout << "Aaaiiiiiieeeee!\n";
  12.  
  13.   pause();
  14.   }

Hope this helps.
Last edited by Duoas : Feb 2nd, 2008 at 1:58 pm.
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Re: Output window disappears instantly !!!!

  #6  
Feb 2nd, 2008
what does non-portable mean ??

and what does pause(); do?
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Re: Output window disappears instantly !!!!

  #7  
Feb 2nd, 2008
what does non-portable mean ??

and what does pause(); do?
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Re: Output window disappears instantly !!!!

  #8  
Feb 2nd, 2008
Non portable means that the code won't work on all systems -- suppose you were to compile on one system it might work but that doesn't mean it will compile on all systems. Using system is a bad idea for pausing. getch() is a lazy excuse. Duoas' solution is good. Use that.
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Re: Output window disappears instantly !!!!

  #9  
Feb 2nd, 2008
Itz asking for a header file for pause and its giving a warning that function should return a value.
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Re: Output window disappears instantly !!!!

  #10  
Feb 2nd, 2008
No idea about pause, but the warning is solved by putting a return 0; before the closing } in main:

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int main() {
  // Your code

  return 0;
}
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