ok ... the trouble started with sizeof(void) = 1
on similar terms sizeof empty class/structure in C++ is also 1
Bjarne Stroustrup's FAQ reasons: "To ensure that the addresses of two different objects will be different. " taken from here
but I cannot use the same reasoning for void ... since I cannot create variables of void type
void x ; <does not hold>
> the trouble started with sizeof(void) = 1
Says who?
gcc reportsCode:#include <stdio.h> #include <stdlib.h> int main ( ) { printf("%d\n", sizeof(void) ); return 0; }
foo.c:5: warning: invalid application of `sizeof' to a void type
vc6 reports either
foo.c(5) : warning C4034: sizeof returns 0
foo.c(5) : error C2070: illegal sizeof operand
You can't have a variable with void type, even if your compiler apparently gives it a non-zero size.
> on similar terms sizeof empty class/structure in C++ is also 1
But C can't have an empty struct.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
thank you! , solves all the troubles
btw... what is the difference between -pedantic and -Wall arguments in gcc ?
I have been using -Wall instead of -pedantic ... so the warnings were bypassed
The gcc manual page explains all.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
