XOR or operation

For arbitrary vector α, there are α^α=0, which can be exchanged without mediation variable value using this attribute:

void Notempswap (int *x, int *y) {    *y=*x^*y;//*y = *x^*y    *x=*x^*y;//*x = *x^*x^*y = *y    *y=*x^*y;  *y = *y^*x^*y = *x}

Note: There is no performance improvement in this practice, just an intellectual game.

Trick1: array elements swapped

There is no intermediate variable, and the order of the elements in the array is reversed.

void Reverse_array (int *a, int count) {int first, last;　　For (first=0,last=count-1;first<last;first++,last--;) {notempswap (&a[first],&a[last]); }}

　　

XOR or operation