Question

I have a std::bitset that I’d like to write to a file, bit for bit, but of course fstream’s write function doesn’t support this. I can’t think of another way besides converting each 8-bit group to a char using string and writing that…

Anyone know of a good way?

Answer 1

Try:

#include <bitset> #include <fstream>  int main() {     using namespace std;     const bitset<12> x(2730ul);      cout << 'x =      ' << x << endl;      ofstream ofs('C:\\test.txt'); // write as txt     if (ofs) {         // easy way, use the stream insertion operator         ofs << x << endl;          // using fstream::write()         string s = x.to_string();         ofs.write(s.c_str(), s.length());      }     return 0; }