Thread: Error Checking...???

  1. 01-18-2003 #1
    justin69enoch
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    Error Checking...???

    Hey Guys... and Gals.
    I am new to this programming thing and I was wondering if anyone can help me. I have to error check a program that I am writing and make sure it will only accept the integers from 0-99.
    It cannot accept alpha characters nor can it accept float or double values... my problem is with the double values. I get it to not accept alpha by using something like

    while((some_variable<100)&&(some_variable>=0)&&(so me_variable!=EOF)) {

    but it will just convert floats to integers and is killing me.. Thanks.
  2. 01-18-2003 #2
    -KEN-
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    I'm sure there's an easier way, but I'd read everything into a character array using a while loop and getch(), validate the input, and if it's valid increment the array's index and move on until you get an enter (ASCII code 13), and run atoi() on your array.
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  3. 01-18-2003 #3
    ammar
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    Originally posted by -KEN-
    ...until you get an enter (ASCII code 13), ...
    Cann't he use '\n'?
    none...
  4. 01-18-2003 #4
    _Cl0wn_
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    Why not look into the ctype header file for is...() functions? Those several functions should shorten some aspects of your code.
  5. 01-18-2003 #5
    -KEN-
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    Originally posted by ammar
    Cann't he use '\n'?
    You'd think so, wouldn't you? But I was writing the reply while thinking about a function I'd written a few days ago for a program in my C++ class that did exactly what he wanted (validating input and error checking), and I tried checking for '\n' and found that it wouldn't accept it, nor any of the other monickers for a newline. I had to settle for the ASCII code...
    entropysink.com -- because arses weren't designed for running websites.
  6. 01-18-2003 #6
    justin69enoch
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    I'm confused...

    I don't know what fgets is???? is there another way.. Thanks for the help thus far.
  7. 01-18-2003 #7
    Sebastiani
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    C'mon man, make some effort here. fgets() is in every C textbook. Look it up please. Finally, study Salem's fine code and actually try to understand it. Also, you can of course say if b[x] == '.' to test for floating point input....
    Code:
    #include <cmath>
#include <complex>
bool euler_flip(bool value)
{
    return std::pow
    (
        std::complex<float>(std::exp(1.0)), 
        std::complex<float>(0, 1) 
        * std::complex<float>(std::atan(1.0)
        *(1 << (value + 2)))
    ).real() < 0;
}
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