bitwise xor and not operator

Question

https://code.sololearn.com/cgYFcQ92dxUs/#c

https://code.sololearn.com/cCRwH0pbo0wj/#c

Can anyone explain me the above code..
How the output comes as 10 1 and 1

Answer 1

In first code, xor makes bits the same 0 and bits different 1 so:
x=0b0001
y=0b1010
x^=y makes x 0b1011
y^=x makes y 0b0001
x^=y makes x 0b1010

In the second code:
!a?b?!c:!d:a
is the same as:
if (!a)
if (b)
!c
else
!d
else
a
Since a is non-zero, it is true so not a is false so the value of a is printed.

Answer 2

John Wells Thank u so much