How Can I Dynamically Determine the Size of a Bitset in C ?

Determining Bitset Size at Initialization

In C , bitsets are commonly defined with a specific size, as seen in the example:

bitset<6> myBitset;

However, when defining bitsets in classes, the size may not be known at compile time. This raises the question of how to dynamically determine the bitset size.

One attempted solution is to utilize a pointer to a bitset:

#include <bitset>

class Test {
public:
    std::bitset *myBitset;
};

However, this approach fails to compile. Alternatively, initializing the bitset with a size determined at runtime also doesn't work:

int size = getDependentSizeForBitset();
myBitset = new bitset<size>();

Solutions

• Boost dynamic_bitset:

Boost libraries provide a dynamic_bitset that allows for dynamic resizing of bitsets.

• vector:

Although not recommended, std::vector can be specialized to simulate a bitset, offering dynamic resizing capabilities.

The above is the detailed content of How Can I Dynamically Determine the Size of a Bitset in C ?. For more information, please follow other related articles on the PHP Chinese website!