string definition

I have following code but find that x and y are the same value on the debugger. viewing ARM assembly review that the memcpy use same string address.

#define A "\xA0\x00\x01"
#define B "\xA0\x00\x02"
memcpy(x, A, sizeof(A)-1);
memcpy(y, B, sizeof(B)-1);

If I change
#define A "\xA0\x01\x01"
#define B "\xA0\x02\x02"
it will be OK.

Tam