How to set, reset and reverse bit

Set operation

Use bit operations OR（|） Operator to set a bit Position as 1.

number |= 1UL << n;

take number Of the n Location 1,n from 0 Start .
If number exceed unsigned long length , Then use 1ULL << n.

Reset operation

Use bit operations AND（&） Operator to set a bit Position as 0.

number &= ~(1UL << n);

take number Of the n Location 0,n from 0 Start .

Reverse operation

Use bit operations XOR（^） Operator to set a bit Bit inversion .

number ^= 1UL << n;

take number Of the n Bit inversion .

The retrieval

take number Move right n position , And then use AND Operator match .

bit = (number >> n)& 1U;

This will get number The first n The value of the bit is stored in bit in .