Keen on Math

Hi please help my program listing 2 digits multiplication 10 lines on screen, pauses and ask if you want to continue or quit by pressing 'Q' it should quit but it doesn't. It could be a very simple problem, but I just cannot figure it out. Please help if you can, thanks.

Code:

---

int main()
{
                clrscr();
                cout << "\t\t\tTWO DIGITS MULTIPLICATION" << endl;
                cout << "\t\t\t=========================" << endl;

                for (int num1 = 11; num1 <= 99; num1++)
                {
                        for (int num2 = 11; num2 <= 99; num2++)
                        {
                                cout << "\t\t\t" << num1 << " * " << num2 << " = " << num1  * num2 <<endl;
                                if (num2 % 10 == 0)
                                {
                                        cout << "\n\t\t\tPress enter to continue, Q to quit.";
                                        char getkey=toupper(getch());
                                        if (getkey == 'Q') break;
                                        cout << "\n\n";
                                }
                        }
                        cout << endl;
                }
                return(0);
}

---

break only exits one loop, not two.

Hi,
Instead of using

Code:

---

if (getkey == 'Q') break;

---

you should use

Code:

---

if(getkey == 'Q') exit(0);

---

I'm not sure in which library it is. I'm using it in my program and doesn't give me any problem.

stdlib.h or cstdlib contains exit(); You could also use return 0;
If you just want to break out of the loops, a goto is permissable in this situation.

Or, use break [to where];

Code:

---

out:
for(;;){
  for(;;){
    break out;
  }
}

---

~Inquirer

Quote:

---

Originally posted by Inquirer
Or, use break [to where];

Code:

---

out:
for(;;){
  for(;;){
    break out;
  }
}

---

~Inquirer

---

goto, you mean.

Don't think so, in my C++ book (i forget the name, but it is by herbert schildt) it shows almost this example.

Quote:

---

Originally posted by Inquirer
Don't think so, in my C++ book (i forget the name, but it is by herbert schildt) it shows almost this example.

---

Maybe you should look for your book review on here and see if it is "recommended" or not. HS has a lot of books that are "Not Recommended" :rolleyes:

Thank you guys for your comments. I've got it sorted after reading Magos' corrrection that a break, breaks out only of one loop at a time, so I only needed to add a flag in the inner loop to indicate that a 'q' has been pressed and a desire to break out the outter loop to be effected.

SoKrA's suggestion would hault the program completely, which I don't want the program to do.

eibro's suggestion to just use return only is interesting, which I will try, not sure if that will work.

Anyway, thank you all tha same.
=============================================
Be nice, be kind, be cheerful, life's too short to be miserable!

return 0; directly in main will function pretty much like exit(0), and exit the whole program.
You could place your code in a sub function and then use return to exit that function, but not main (thus allow you to do other stuff after the loops).