bitset::size

Returns the number of bits in a bitset object.

size_t size( ) const;

Return Value

The number of bits, N, in a bitset<N>.

Example

When compiling this example with the /Wp64 flag or on a 64-bit platform, compiler warning C4267 will be generated. For more information on this warning, see Compiler Warning (level 3) C4267.

// bitset_size.cpp
// compile with: /EHsc
#include <bitset>
#include <iostream>

int main()
{
    using namespace std;

    bitset<5> b1(6);
    size_t i;

    cout << "The set of bits in bitset<5> b1( 6 ) is: ( "<< b1 << " )"
         << endl;

    i = b1.size();

    cout << "The number of bits in bitset b1 is: " << i << "."
         << endl;
}

The set of bits in bitset<5> b1( 6 ) is: ( 00110 )
The number of bits in bitset b1 is: 5.

Requirements

Header: <bitset>

Namespace: std

See Also

Reference

bitset Class