How this swapping works?

Question

b=a-b+(a=b)

Answer 1

Hatsy Rei ChillPill Gordon KrOW ....pls help me understand how this expression is evaluated

Answer 2

ChillPill thanks

Answer 3

Operator precedence is the key about this intelligent swap expression. The equal to '=' operator accumulates Right hand side expression, from right to left, parenthesis is evaluated first which overwrite a's memory location with vale inside variable b, 11 with moving left there is + and - arithmetic operators which has equal precedence yields 5, stores it in left hand side b=5. Nice work ChillPill

Answer 4

This will assign the value of a to b. Since a=b ,the +b and -b will gets cancelled and results in b=a