Re: [PIC] Learning C

Hi Spehro,

In SOME cases I agree with you ternary does seem to makes code easier to 
follow but in others it can actually cause problems. I only use it where 
the condition is VERY simple.

I recently had a situation in PHP where something that looked like a 
VERY simple ternary caused major havoc with a web server and was causing 
IP addresses to be locked out by the firewall.

Something like:

echo "<img src='", x ? "LED_ON.png" : "LED_OFF.png", "' />\n";

The server couldn't find LED_ON.png and so PHP was throwing up an error 
message wich was huge problems for the server.

The nice thing about PHP is that the sytax closely follows C so it is 
very easy to pick up - another good reason for learning C :-)

Friendly Regards
Sergio Masci


On Thu, 14 Nov 2024, Spehro Pefhany wrote:

> At 03:56 AM 2024-11-14, you wrote:
>> Ans 404 to you :-)
>> 
>> Onew of the problems I have with trying to understand code examples in C is
>> that so many of them are incomprehensibly dense.
>> What would be five or six lines in Pascal or Basic is a single line in C.
>> I appreciate that that is down to the programmer not the language but it is
>> off putting
>> i have to remind my self of the old adage:  You can write Pascal in any
>> language
>
> I do like the ternary operator '?' in C (and in some other languages)
> which reduces several lines to one and is still very readable, maybe more
> so.
>
> variable = condition ? value_if_true : value_if_false
>
> instead of
>
> if (a > b) {
>    result = x;
> }
> else {
>    result = y;
> }
>
>
> just write
>
> result = a > b ? x : y;
>
> Best regards, Spehro Pefhany 
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