What are the advantages/disadvantages of XOR swap over using a temporary variable? I think it looks cleaner to use an XOR and also eliminates using an extra variable, however that's really not a big deal anyways with all the memory available. Why don't schools teach more about bitwise operators? Are they really that unimportant?
Code:int main(void) { int x=5,y=12; x^=y; y^=x; x^=y; return 0; }Code:int main(void) { int x=5,y=12, temp; temp=x; x=y; y=x; return 0; }
1. Try the xor swap within a function, using pointers to two integers.
2. Then try and swap a variable with itself - like swap(&a,&a);
3. Try using xor swap for other data types, like floats, doubles, pointers, structures.
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.
Ahh, yeah I guess I was not thinking nearly enough
