算法之旅，直奔<bitset>之五 count

count（vs2010）

#include <iostream>       // std::cout
#include <string>         // std::string
#include <bitset>         // std::bitset

int main ()
{
std::bitset<8> foo (std::string("10110011"));

std::cout << foo << " has ";
std::cout << foo.count() << " ones and ";
std::cout << (foo.size()-foo.count()) << " zeros.\n";
system("pause");
return 0;
}