"jel" <loisjeit2@hotmail.com> wrote in message
news:1993e8d6.0311181944.3faed888@posting.google.c om...[color=blue]
> I ran what was submitted in several forums, but it's not exactly what
> i'm looking for. I'm dy'n over here. Ah, the frustrations of an
> amateur programmer. I included the code below in c++. which details
> what i'm looking for. I'm sure its just a small detail. But I'm in the
> dark.
>
> // numbers1to10only.cpp
>
> #include <iostream.h>
>
> int main()
> {
> double x; // Variable for user input
>
> do // I want it to loop until user <ctl+c> to quit.
> {
> cout << "\nWhich NUMBER 1-10 do you wish to display?\n";
> cin >> x; // Get Input from user.
> cout << "\nThe VALUE you entered was: " << x << ".";
> if ((x < 1) || (x > 10))
>
> /* I'm on my second bottle of asprin now. Still no effect.
>
> I only want the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 to be
> valid. No #'s containing decimals (before, middle, or after), no
> letters of any kind, no special characters of any kind, etc...
> **I just want the numbers 1-10 to be valid.** All else, I want
> the error "below" to be displayed. ALSO, even after the user gives
> what is asked (above), I'm looking to have it prompt again with
> the same question above, (As it currently does above.)
>
> I've tried several options from online forums but not exactly
> what i'm looking for. Very close thought. If you run throught
> my program as it is now, you'll see that #'s 1-10 (1.2, 9.0)
> come up as valid answers. That's not what i'm looking for.
> Also, if the user enters an (or several) alpha character, or
> special character, the program does a scrolling thing with the
> error below. I don't know how to make that stop. I just want
> the error to display once, then prompt user with ? above. You'll
> see what I mean if you run the program and put in various imputs.
>
> Sorry about length of explination.*/
>
> {
> cout << "\nERROR, Ahhh!, You're trying to be funny.\n";
> cout << "However, the NUMBER: " << x << " you selected is not
> valid.\n";
> cout << " It must be 1-10.\n";
> cout << " Nice try though, but do try again.\n";
> cout << "************************";
> }
> } while ((x > 1) || (x < 10));
> return 0;
> }
>
> Thanks for any help you-all can provid.
> JEL[/color]
Look here for code that will reject non numbers:
http://www.parashift.com/c++-faq-lit....html#faq-15.2
Though the code there will convert floating point numbers to ints, and
accept them.
This would reject floating point numbers:
#include <iostream>
int main()
{
std::cout << "Enter a number, or -1 to quit: ";
float i = 0;
while (std::cin >> i) { // GOOD FORM
if (i == -1 || i != (int) i) break;
std::cout << "You entered " << i << '\n';
}
}
--
Derek
