C++ Bitset Library - set() Function

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Description

The C++ function std::bitset::size() Reports the size of the bitset.

Declaration

Following is the declaration for std::bitset::size() function form std::bitset header.

C++98

 size_t size() const; 

C++11

 constexpr size_t size() noexcept; 

Parameters

None

Return value

Returns the number of element present in the bitset.

Exceptions

This member function never throws exception.

Example

The following example shows the usage of std::bitset::size() function.

 #include <iostream> #include <bitset> using namespace std; int main(void) { bitset<4> b; cout << "Bitset contains " << b.size() << " bits." << endl; return 0; } 

Let us compile and run the above program, this will produce the following result −

 Bitset contains 4 bits.