What are the uses of bitset in C++?

In C++, the main purposes of bitset are as follows:

1. Storage and manipulation of binary bit sequences: bitset allows you to store and manipulate binary bit sequences in a concise manner. You can think of a bitset object as a fixed-length binary number, where each bit represents a boolean value (0 or 1).
2. Bit manipulation: bitset provides a variety of bit operation functions, such as setting bits (set), clearing bits (reset), and flipping bits (flip). You can use these functions to perform various operations on a sequence of bits, such as setting a specified bit to 1 or 0, or flipping all bits.
3. Bit manipulation: bitset also supports operations such as AND, OR, and XOR. You can use these operators to perform bit manipulation on two bitset objects, such as performing an AND operation on two bitsets to get a new bitset object where each bit is the result of performing an AND operation on the corresponding bits of the two bitsets.
4. Integer Conversion: bitset provides functions to convert an integer to a binary bit sequence and vice versa. You can use the constructor of bitset to convert an integer to its corresponding binary bit sequence, or use the to_ulong() or to_ullong() functions to convert a binary bit sequence to an unsigned integer.

In conclusion, bitset is a very useful tool for easily storing and manipulating binary bit sequences, meeting various needs for bit operations and bit calculations.