[troppo]

Hi All,
First of all im very new to programming and am only trying to program my first little thing, so forgive me if i have no idea what your talking about lol

ok so im writting a small program with this source code from a text book

#include <stdio.h>

main()
{
printf("hello world\n");
return 0:
}

and i save it and then compile it using Dev-C++ and when i double-click on the application file the program comes up quickly and then dissapears really quickly is there something im doing wrong? or have i just missed a step somewhere?

Thank you for your time,
Troppo

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First off, return 0 should have a semicolon [;] after it, not a colon [:]. Let's assume that was just a typo here. return 0 exits the program... so the solution would be:

1. Run the program from command prompt. It then exits to command prompt, but you can still see the results.
2. Remove the return 0. Then, to exit the program, just hit the little X in the top right hand corner, like most other programs.
3. Call something that waits for user input, such as getchar.
Ex.

#include <stdio.h>
main()
{
printf("hello world\n");
printf("press enter to continue\n");
getchar();
return 0;
}

Edited by stettybet0, 12 July 2007 - 09:58 AM.

[stettybet0]

First off, return 0 should have a semicolon [;] after it, not a colon [:]. Let's assume that was just a typo here. return 0 exits the program... so the solution would be:

1. Run the program from command prompt. It then exits to command prompt, but you can still see the results.
2. Remove the return 0. Then, to exit the program, just hit the little X in the top right hand corner, like most other programs.
3. Call something that waits for user input, such as getchar.
Ex.

#include <stdio.h>
main()
{
printf("hello world\n");
printf("press enter to continue\n");
getchar();
return 0;
}

Edited by stettybet0, 12 July 2007 - 09:58 AM.

[jpshortstuff]

#include <stdio.h>

main()
{
printf("hello world\n");
return 0:
}

no, your not really doing anything wrong.

whats happening is, your program is writing "Hello World" to the screen, then its reaching the 'return 0' line which returns it from the method, ending the program. if you want to leave the message up, try adding this line to your program:

system("PAUSE");

just after your printf("hello world\n");

this will put a predefined: "Press any key to continue..." which will wait for the user to press a key, before getting to the 'return 0' statement.

#include <stdio.h>

main()
{
	  printf("hello world\n");
	  system("PAUSE");
	  return 0:
}

hope this helps,

jpshortstuff

EDIT: beaten by stettybet0, with more knowledgeable solutions

Edited by jpshortstuff, 12 July 2007 - 10:09 AM.

[stettybet0]

I'm afraid I have to recommend against using what jpshortstuff said... Using his code will make your program unable to work under any operating system but Windows. And anything that can be done through system calls can be done natively in C++. And lastly, you have to include another header file to use system calls.

See here for more info: http://www.gidnetwork.com/b-61.html

[jpshortstuff]

well there you have it, i was wrong

i was also going to suggest using a form of input to keep the command box up (cin, scanf, getchar()) but i thought id just leave it at the system command for now. i dont really know enough about compatibility and c++ in general to tell what is good or bad

well, i learned something, thanks

jpshortstuff

Edited by jpshortstuff, 12 July 2007 - 11:24 AM.

[troppo]

Hey All,
Thanks very much its working now

thats my first program little thing i no its nothing special but im just starting Thanks so much now i can move on to something a little more difficult thank you all for your help

Troppo