DaniWeb Forum Index > Software Development > C++

Binary String in to Integer in c++

Please support our C++ advertiser: Programming Forums - DaniWeb Sister Site

•

Join Date: Apr 2007

Posts: 17

Reputation: MukeshZ is an unknown quantity at this point

Solved Threads: 0

MukeshZ

Offline

Newbie Poster

Binary String in to Integer in c++

Apr 27th, 2007

hi

I want convert Binary String to intger Format in c++.
like "00000100" should give me as "04" or "4"
could anyone suggest me the solution for it.

thanks
Mukesh

•

Join Date: Dec 2006

Posts: 1,089

Reputation: vijayan121 is a name known to all

Solved Threads: 164

vijayan121 vijayan121 is offline

Offline

Veteran Poster

Re: Binary String in to Integer in c++

Apr 27th, 2007

construct a bitset using the string and then convert it to a ulong.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
#include <string>
#include <bitset>
#include <limits>
using namespace std ;
 
int main()
{
  string str = "00000100" ;
  cout << bitset<numeric_limits<unsigned long>::digits>(str).to_ulong() 
         << '\n' ;
}
#include <iostream>
#include <string>
#include <bitset>
#include <limits>
using namespace std ;

int main()
{
  string str = "00000100" ;
  cout << bitset<numeric_limits<unsigned long>::digits>(str).to_ulong() 
         << '\n' ;
}