Hi,
The following program segfaults when compiled with gcc
but runs fine when compiled with g++ or icc (the intel C compiler)
#include
struct Hello {
char world[20];
};
struct Hello s(){
struct Hello r;
r.world[0]='H';
r.world[1]='\0';
return r;
}
int main(){
That's strange. When I try to compile this with gcc 4.3.2 on Ubuntu 8.10
(Intel core2 duo)
I get
stest.c: In function ‘main’:
stest.c:13: warning: format ‘%s’ expects type ‘char *’, but argument 2
has type ‘char[20]’
The resulting binary does not segfault but prints garbage (probably
uniniti
Ok thanks for the clear explanation!
Not being able to threat char[] as a string is rather shocking to me though.
Regards,
Michel
The C standard says no such thing; only integer promotions are
performed. (See 6.5.2.2 of the C99 final draft.)
Ok one more question. Why does this not give a warning then (and runs fine)?
#include
struct Hello {
char world[20];
};
struct Hello s(){
struct Hello r;
r.wor
Andrew Haley wrote:
Andrew Thomas Pinski wrote:
C++98 is not C99 :) there is no rvalue to lvalue conversion for rvalue
arrays in C++98. Also this code is still undefined C99 but will most
likely become valid C1x.
Ah, it's an rvalue array. Good point.
Ok now I understand. I assume t
