Am 29.08.16 um 14:46 schrieb Steve D'Aprano:
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";
Let me see if I've got this straight... Bart's second assignment will
allocate a block of memory at least five bytes in size, stuff the ASCII
codes for 'h', 'e', 'l', 'l' and 'o' in that block (possibly with a null
byte at the end?) and then assign x to the address of that block.
Am I right?
Almost - the block of memory is statically allocated, i.e. there is a
block of memory reserved for "constants" that are loaded on start-up of
the program. x is assigned a pointer to that string. The difference is
that you are not allowed to write to this memory area, for some
compilers it causes a segfault if you try to write there.
YMMV - I consider this a gross abuse of "dark corners" in C.
Christian
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