int b = 900;
a |= b;
==>a = a|b
|是按位或操作，就是只要有一个1就是1，两个都是0才是0
a != b -----> a = a | ba &= b -----> a = a & b
a ^= b -----> a = a ^ b
“|=”是什么运算符号？
int a = 35;
int b = 900;
a |= b;
==>a = a|b
a &= b -----> a = a & b
a ^= b -----> a = a ^ b
int b = 900;
a |= b;
==>a = a|b
a &= b -----> a = a & b
a ^= b -----> a = a ^ b