C++ Tutorial/bitset/bitset transform
Версия от 14:21, 25 мая 2010; (обсуждение)
Transform binary representation into integral number using bitset
/* The following code example is taken from the book
* "The C++ Standard Library - A Tutorial and Reference"
* by Nicolai M. Josuttis, Addison-Wesley, 1999
*
* (C) Copyright Nicolai M. Josuttis 1999.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
*/
#include <bitset>
#include <iostream>
#include <string>
#include <limits>
using namespace std;
int main()
{
/* print some numbers in binary representation
*/
cout << "267 as binary short: "
<< bitset<numeric_limits<unsigned short>::digits>(267)
<< endl;
cout << "267 as binary long: "
<< bitset<numeric_limits<unsigned long>::digits>(267)
<< endl;
cout << "10,000,000 with 24 bits: "
<< bitset<24>(1e7) << endl;
/* transform binary representation into integral number
*/
cout << "\"1000101011\" as number: "
<< bitset<100>(string("1000101011")).to_ulong() << endl;
}267 as binary short: 0000000100001011 267 as binary long: 00000000000000000000000100001011 10,000,000 with 24 bits: 100110001001011010000000 1000101011" as number: 555
