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Collection/连~都忘记了的小知识.md
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@@ -26,5 +26,5 @@ mv mount_hgfs /bin #移动到/bin路径下 以后使用 mount_hgfs 直接执行
- C语言`&&`运算符的左值为假时，右值不进行计算，同理`||`运算符左值为真右值不进行计算 - C语言`&&`运算符的左值为假时，右值不进行计算，同理`||`运算符左值为真右值不进行计算
- 按位异或`^，a ^ b = c , a ^ c = b , b ^ c = a;`,可用于进行数的交换（省去中间值） - 按位异或`^，a ^ b = c , a ^ c = b , b ^ c = a;`,可用于进行数的交换（省去中间值）
- C语言左移`<<`就是与2的x次方相乘，右移为相除 - C语言左移`<<`就是与2的x次方相乘，右移为相除
- 简便运算后有括号`data |= 0x03 << 14 ==> data = data | (0x03 << 14)` - 简便运算后有括号`a *= 5+8 ==> a = a * (5 + 8)`，赋值运算符的优先级很低
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