My program exits on me right away!

Hi,
I just started programming three days ago and I am having a little problem. When I run a program I have made that doesnt require any input (like Hello World!), the DOS window will open and close with a second. I have found the only way to prevent this is to use this bit of code...

Code:

---


#include <iostream>

unsigned short t;

int main ()
{
    std::cout<<"Press any key followed by enter to exit\n";
    std::cin >> t;
   
    return 0;
}

---

Help?

Code:

---


#include <iostream>

unsigned short t;

int main ()
{
    std::cout<<"Press any key followed by enter to exit\n";
    std::cin >> t;
 
    system("PAUSE");
 
    return 0;
}

---

Help?
not the best way but it works

What do you mean not the best? It works great! Plus it displays that cool "Press any key to continue..." line of text! Thank you! :D

I think it is system and compiler specific function....not to sure.

A more common way would be to use cin.get() instead.

system command is not a portable code...go for this

Code:

---

#include <iostream>
#include <limits>

using namespace std;

int main()
{
  // Your code here

  // Clean up the stream and ask for input
  cin.ignore ( numeric_limits<streamsize>::max(), '\n' );
  cin.get();
}

---

lol using system("PAUSE") would br much shorter

But system("pause") would only work on a limited range of computers. Try using it on a mac and it won't work.

The other version will work on any platform.

Quote:

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Originally Posted by sunnypalsingh

system command is not a portable code...go for this

Code:

---

#include <iostream>
#include <limits>

using namespace std;

int main()
{
  // Your code here

  // Clean up the stream and ask for input
  cin.ignore ( numeric_limits<streamsize>::max(), '\n' );
  cin.get();
}

---

---

Lol, I understand about 25% of that code. :D Just started programming four days ago... :D Thanks for the help!

Quote:

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Originally Posted by aznboi

lol using system("PAUSE") would br much shorter

---

never use the system function. It invokes another program do the "pausing" for you. It's not standard C++ so it's makes your code less portable.

Quote:

---

never use the system function.

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I wouldn't say that - but in this specific case it is a bad idea - for more details and a correct explanation you can refer to the programming tips section of the website.

Use this then....if you couldn't understood previous solution but don't use system

Code:

---

#include <stdio.h>

intmain(int argc, char **argv)
{
  printf ("Press ENTER to continue.\n");
  getchar (); /* wait for input */
  return 0;
}

---

Man you guys are fussy fuss pots. If his application is only for Windows, and it only prints Hello World, then surely the system() function is OK? I mean, sure, he COULD port 'Hello World' to Linux, but I don't think theres a lot of reason to do so.

I'm sure it's a better practice to stay platform independant and stick to the standard library as much as possible, but theres time to learn that later - I think for now system("pause") is fine.