C++ Bitset 中的 size()函数

int size();

#include <iostream>
#include <bitset>
using namespace std;
int main()
{
    bitset<8> b;
    bitset<6> b1;
   cout << "size of bitset b : " << b.size() <<'\n'; 
     cout << "size of bitset b1 : " << b1.size() <<'\n'; 
   return 0;
}

#include <iostream>
#include <bitset>
using namespace std;
int main()
{
    bitset<8> b(string("01010110"));
    bitset<4> b1(string("0110"));
      int a = b.size();
      int c = b1.size();
   cout << "size of bitset b : " << a <<'\n'; 
     cout << "size of bitset b1 : " << c <<'\n'; 
   return 0;
}