what *p1 ^= *p2; does in c

Question

In C what does this statement do?

*p1 ^= *p2;

p1 and p2 are char pointers pointing to two different address of a char

Answer 1

This

*p1 ^= *p2;

is the compound assignment operator with the bitwise exclusive OR operator,

It is a substitution for this expression statement

*p1 = *p1 ^ *p2;