Programming Forums > Application Development > C++

wannabe7 · Feb 16th, 2008, 1:29 PM

Some of the programs that I run on Dev+-C++ won't run for some reason. Does this occur often? If so, what can I do? (I don't have a code with me but I'm sure that errors isn't the reason why my program isn't running.)

If anyone can help, Thanks!

Ancient Dragon · Feb 16th, 2008, 4:28 PM

>> but I'm sure that errors isn't the reason why my program isn't running
Hate to be the bearer of bad news but 99.99999% of the time that is exactly the reason a program won't run. If not syntax errors then logic errors.

>>If anyone can help
Impossible without the source code. I don't have my crystle ball with me today or I'd ask the Gods about your code

wannabe7 · Feb 21st, 2008, 8:09 PM

Ok, here's a simple program that I recently wrote (and won't run):

(Toggle Plain Text)

 
#include <iostream>
using namepace std;

int main()
{ 
     int length, width

     cout << "Enter the length: ";
     cin >> length;

     cout << "Enter the width: ";
     cin >> width;

     cout << "The area is: ";
     cout << length * width;

     return 0;
}

wannabe7 · Feb 21st, 2008, 8:09 PM

Bump. Thanks.

Jimbo · Feb 21st, 2008, 8:32 PM

Define "won't run". Do you get any reaction out of your IDE when you try to run it? Maybe something just pops up and goes away or something? Do the tool windows get changed (not familiar with Dev-C++ sorry)?

Sane · Feb 21st, 2008, 9:02 PM

You misspelled "namespace".
You're missing a semi-colon on line 6.

(Toggle Plain Text)

#include <iostream>
using namespace std;

int main()
{ 
     int length, width;

     cout << "Enter the length: ";
     cin >> length;

     cout << "Enter the width: ";
     cin >> width;

     cout << "The area is: ";
     cout << length * width;

     return 0;
}

mattireland · Feb 22nd, 2008, 5:32 AM

Try putting in a

(Toggle Plain Text)

SYSTEM("PAUSE");

at the end. This will make the prompt stay about for longer so you'll be able to actually see the output of the program. I think it only works in the latest version of Bloodshed Dev C++ though....

Ooble · Feb 22nd, 2008, 5:43 AM

That'll only work on Windows under standard circumstances - there are any number of changes to the OS or file system that could cause that to fail. And it definitely won't work on *nix - including Mac OS.

Try this:

(Toggle Plain Text)

cout >> "Press any key to exit." >> endl;
cin.get();

grumpy · Feb 22nd, 2008, 2:45 PM

To explain what's happening. The code is "running". However, the program completes and terminates. The system therefore determines that the console window (which was created specifically for the purpose of running the program) to which output has been written is no longer needed, so it destroys the console window. Net effect is that the program disappears before you can see its output.

Sane · Feb 22nd, 2008, 2:53 PM

I'm trying to figure out where the confusion still lies. He posted code that clearly had some errors in it. It also had cin statements before the console could even terminate, so that could not be the problem.

I think his compiler was just giving him heck for his missing semi-colon. But perhaps that wasn't a good example of his problem.

Feb 16th, 2008, 1:29 PM	#1
wannabe7 Newbie Join Date: Dec 2007 Posts: 16 Rep Power: 0	My programs aren't running...( no errors) Some of the programs that I run on Dev+-C++ won't run for some reason. Does this occur often? If so, what can I do? (I don't have a code with me but I'm sure that errors isn't the reason why my program isn't running.) If anyone can help, Thanks!

Feb 16th, 2008, 4:28 PM	#2
Ancient Dragon PFO God In Training Join Date: Jun 2005 Location: near St Louis, MO. (USA) Posts: 530 Rep Power: 4	Re: My programs aren't running...( no errors) >> but I'm sure that errors isn't the reason why my program isn't running Hate to be the bearer of bad news but 99.99999% of the time that is exactly the reason a program won't run. If not syntax errors then logic errors. >>If anyone can help Impossible without the source code. I don't have my crystle ball with me today or I'd ask the Gods about your code

Feb 21st, 2008, 8:09 PM	#3
wannabe7 Newbie Join Date: Dec 2007 Posts: 16 Rep Power: 0	Re: My programs aren't running...( no errors) Ok, here's a simple program that I recently wrote (and won't run): (Toggle Plain Text) #include <iostream> using namepace std; int main() { int length, width cout << "Enter the length: "; cin >> length; cout << "Enter the width: "; cin >> width; cout << "The area is: "; cout << length * width; return 0; } #include <iostream> using namepace std; int main() { int length, width cout << "Enter the length: "; cin >> length; cout << "Enter the width: "; cin >> width; cout << "The area is: "; cout << length * width; return 0; }

Feb 21st, 2008, 8:09 PM	#4
wannabe7 Newbie Join Date: Dec 2007 Posts: 16 Rep Power: 0	Re: My programs aren't running...( no errors) Bump. Thanks.

Feb 21st, 2008, 8:32 PM	#5
Jimbo Battle Programmer Join Date: Feb 2006 Location: Bellevue, WA, USA Posts: 751 Rep Power: 3	Re: My programs aren't running...( no errors) Define "won't run". Do you get any reaction out of your IDE when you try to run it? Maybe something just pops up and goes away or something? Do the tool windows get changed (not familiar with Dev-C++ sorry)? __________________ <insert disclaimer here> <insert shameless plug for Visual Studio here>

Feb 21st, 2008, 9:02 PM	#6
Sane Programming Guru Join Date: Apr 2005 Posts: 1,827 Rep Power: 5	Re: My programs aren't running...( no errors) You misspelled "namespace". You're missing a semi-colon on line 6. (Toggle Plain Text) #include <iostream> using namespace std; int main() { int length, width; cout << "Enter the length: "; cin >> length; cout << "Enter the width: "; cin >> width; cout << "The area is: "; cout << length * width; return 0; } #include <iostream> using namespace std; int main() { int length, width; cout << "Enter the length: "; cin >> length; cout << "Enter the width: "; cin >> width; cout << "The area is: "; cout << length * width; return 0; } __________________ Waterloo's Canadian Computing Competition (CCC) - Stage 2 Problems, Solutions, and Test Data

Feb 22nd, 2008, 5:32 AM	#7
mattireland Hobbyist Programmer Join Date: Jul 2007 Location: Wales, United Kingdom Posts: 199 Rep Power: 2	Re: My programs aren't running...( no errors) Try putting in a (Toggle Plain Text) SYSTEM("PAUSE"); SYSTEM("PAUSE"); at the end. This will make the prompt stay about for longer so you'll be able to actually see the output of the program. I think it only works in the latest version of Bloodshed Dev C++ though.... __________________ Matt Ireland http://www.mattireland.org matt@mattireland.co.uk

Feb 22nd, 2008, 5:43 AM	#8
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	Re: My programs aren't running...( no errors) That'll only work on Windows under standard circumstances - there are any number of changes to the OS or file system that could cause that to fail. And it definitely won't work on *nix - including Mac OS. Try this: (Toggle Plain Text) cout >> "Press any key to exit." >> endl; cin.get(); cout >> "Press any key to exit." >> endl; cin.get(); __________________ Me :: You :: Them

Feb 22nd, 2008, 2:45 PM	#9
grumpy Programming Guru Join Date: Jun 2005 Location: Adelaide, South Australia Posts: 1,206 Rep Power: 5	Re: My programs aren't running...( no errors) To explain what's happening. The code is "running". However, the program completes and terminates. The system therefore determines that the console window (which was created specifically for the purpose of running the program) to which output has been written is no longer needed, so it destroys the console window. Net effect is that the program disappears before you can see its output.

Feb 22nd, 2008, 2:53 PM	#10
Sane Programming Guru Join Date: Apr 2005 Posts: 1,827 Rep Power: 5	Re: My programs aren't running...( no errors) I'm trying to figure out where the confusion still lies. He posted code that clearly had some errors in it. It also had `cin` statements before the console could even terminate, so that could not be the problem. I think his compiler was just giving him heck for his missing semi-colon. But perhaps that wasn't a good example of his problem. __________________ Waterloo's Canadian Computing Competition (CCC) - Stage 2 Problems, Solutions, and Test Data Last edited by Sane; Feb 22nd, 2008 at 3:08 PM.

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Programming Forums > Application Development > C++

My programs aren't running...( no errors)