@Tendua: The statement *a ^= *b ^= *a ^= *b violates the sequence
point rule, which says that results are undefined if a variable is
assigned more than one value between sequence points.
Dave
On Jul 12, 3:15 pm, tendua <6fae1ce6347...@gmail.com> wrote:
> # include <stdio.h>
>
> void swap(int *a, int *b)
> {
> *a ^= *b ^= *a ^= *b;
> }
>
> int main()
> {
> int a=45, b= 56;
> // a ^= b ^= a ^= b;
> swap(&a,&b);
> printf("%d %d",a,b);
> }
>
> This code gives output 0, 45
> While if we uncomment the line in main function and don't use swap
> function, we get correct value. Explain why the same line when used in
> swap function gives such output.
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