#include <stdio.h> /* Why the first swap operation works as expected but it does not happen the same with the second one ? I guess that it can be due operations within temp values, but IMHO swap operation should work in both cases.
Thanks ! */ void swap(int *a, int *b) { *a ^= *b ^= *a ^= *b; } int main() { int a = 5; int b = 8; printf("%d, %d\n", a, b); a ^= b ^= a ^= b; printf("%d, %d\n", a, b); swap(&a, &b); printf("%d, %d\n", a, b); } -- Summary: strange behavior of a chain of operations. Product: gcc Version: unknown Status: UNCONFIRMED Severity: major Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: nospam at pamies dot cat http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39121