'= |'是什麼意思運營商呢？

Question

我使用Google搜索，但它沒有返回與表達式相關的結果。我猜測它與位有關。 =|究竟做了什麼？

Answer 1

看這個

http://www.tutorialspoint.com/cprogramming/c_operators.htm

所以

| inclusive bitwise OR 
    = assignment 
    |= bitwise inclusive OR and assignment 
    =| syntax error 

至於| =

a |= b; 

等於

a = a | b;