How to Initialize a Bitset with a Variable Size in C ?

Customizing Bitset Size at Initialization

In C , declaring and using a bitset is straightforward for a known size, as seen in this example:

std::bitset<6> myBitset;

However, defining a bitset with a variable size during class initialization presents a challenge. Consider this non-compiling code:

#include <bitset>
class Test
{
public:
     std::bitset *myBitset;
};

Initializing the bitset based on a dynamically determined size also fails:

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

Solution:

To address this issue, there are two options:

• Boost's Dynamic Bitset:
  Boost provides a dynamic_bitset that allows you to dynamically specify the size of the bitset during initialization.
• Vector Specialization:
  Vector in C is specialized to act as a bitset. While this can be confusing, it allows you to initialize a bitset with a variable size using:

std::vector<bool> myBitset;

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