On 29/08/2016 15:00, Grant Edwards wrote:
On 2016-08-29, Chris Angelico <ros...@gmail.com> wrote:
On Mon, Aug 29, 2016 at 10:13 PM, BartC <b...@freeuk.com> wrote:
In C, you can write this:
int x;
x = 5;
x = "hello";
With certain compilers (eg. gcc) you only get a warning. (And since
I don't show warnings to avoid inundation, that seems to compile
fine for me!)
If you're ignoring compiler warnings, you're asking for problems and
deserve whatever trouble you get.
(It's my IDE that's not displaying the warnings because it can use any C
compiler and some of them really will swamp the output with harmless
warnings that often cannot be turned off (about unused labels for example).
The situation is a little unusual as normally the C being compiled has
been machine-generated so the actual source has already been mostly
verified. (And in that source language, assigning "hello" directly to x
is an error as a cast is mandatory.)
That's because strings, in C, are really pointers-to-char, and for
hysterical raisins, pointers can be assigned to integers with just a
warning. (Good code should have an explicit cast here.)
You probably should have warnings enabled.
(Possibly they should be displayed when compiling 'straight' C. But then
I wouldn't be able to 'assign a string to an integer' without any
apparent problem!)
--
Bartc
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