大约有 33 项符合查询结果（耗时：0.0099秒） [XML]
Is multiplication and division using shift operators in C actually faster?
...
Just downloaded an arduino sketch that has millis() >> 2; Would it have been too much to ask to just divide?
– Paul Wieland
Jun 10 '16 at 10:41
...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...aning. If I take a smaller example, suppose I have a program running on my Arduino which sends via serial a packet of 16 bytes which have the following meaning:
0: message type (1 byte)
1: target address, MSB
2: target address, LSB
3: data (chars)
...
F: checksum (1 byte)
Then I can declare somet...
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
...s that neither is long enough for a pointer.
avr-gcc 4.3.2 / ATmega168 (Arduino Diecimila)
The failed assumptions are:
..14 i++ is structly left to right
..16 malloc()=NULL means out of memory
..19-2 short<int
..21 Evaluation is left to right
..22 floating point is always IEEE
The Atmega16...