new, needs help

[trenhob1]

Hi everyone. I just got a compiler, and I made a "Hello World" type of program, but when I run it, I get a black screen that pops up for about a second, then it disappears. Help.

[Nakeerb]

post your code?

[trenhob1]

I think the code's right, because I used it straight from a guide, and I can compile it without errors, but here goes.


#include <iostream.h>

int main()
{
cout << "Hello World!\n";
return 0;
}



The problem comes to when I run it. A DOS screen pops up, disappears, and that's it.

[OneStiffRod]

#include <iostream>
#include <conio.h>  //I think this is the one with getch()

using namespace std;

int main()
{
cout << "Hello World!\n";
cout<<"Press any key to continue"<<endl;
getch();
return 0;
}

[trenhob1]

Yeah, that works. Why was that stuff added? Just linking me to an explanation would be fine.

[D-Man]

getch() waits for a keypress i think , You could also just run your program in the command prompt. Start-> Run -> Command and then execute your program with that. When running the executable strait off, it does what its sopose to do then quits.

[OneStiffRod]

conio.h is the DOS header I beleive - and it contains a function called getch() which waits for a user to press a KEY.

after the key is pressed your program will continue which in this case returns 0; and your program exits.

All C++ programs act this way, once main() exits or returns a value the program ends, so you need to place something in between the return; statement if you don't want your program to end so quickly.

[trenhob1]

Ok, thanks. That really should be in the beginner's manuals.

[Eibro]

Conio is nonstandard... better to vouch for something along the lines of:

#include <iostream>

int main()
{
    using namespace std;

    cout << "Hello World!\n";
    cin.get();

    return 0;
}

[moi]

better better way is to run in a real console window that dumps one back to shell prompt after termination.