C 位 操作
一、C bit 操作(C语言 二进制位 操作)
1.Setting a bit
Use the bitwise OR operator (|) to set a bit.
number |= 1 << x;
讯享网
That will set bit x.
2.Toggling a bit
The XOR operator (^) can be used to toggle a bit.
讯享网number ^= 1 << x;
That will toggle bit x.
3.Clearing a bit
Use the bitwise AND operator (&) to clear a bit.
number &= ~(1 << x);
That will clear bit x. You must invert the bit string with the bitwise NOT operator (~), then AND it.
4.Checking a bit
To check a bit, shift the number x to the right, then bitwise AND it:
讯享网bit = (number >> x) & 1;
That will put the value of bit x into the variable bit
5.Changing the nth bit to x
二、C decimal 操作 (C语言 十进制位 操作)
1.Get a 位
和二进制的操作比较类似,其中的<<(二进制左移)在10进制里面相当于÷10。在10进制里面可以用循环来实现。
2.Set a 位
参考:
REFERENCE:How do you set, clear and toggle a single bit in C/C++?

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