Fastest way to Convert String to Binary?

Question

I want to convert a string, using the string class - to Binary. What is the fast way to do this character by character. Loop? Or is there some function out there that will convert for me? 1's and 0's binary.

A string being:

#include <string>
using namespace std;
int main(){
  myString = "Hello World";
}

you want this: http://stackoverflow.com/questions/505021/get-bytes-from-stdstring-in-c — Serdalis, Apr 17 '12 at 02:11
What would you like to see as the output for "Hello, world"? 11*8 `0` or `1` characters representing binary ASCII codes of the string characters, or something else? — Sergey Kalinichenko, Apr 17 '12 at 02:15
So what have you tried - the code that you have does not even compile... — Alexei Levenkov, Apr 17 '12 at 02:27

score 45 · Accepted Answer · answered Apr 17 '12 at 02:25

45

Using std::bitset would work:

#include <string>
#include <bitset>
#include <iostream>
using namespace std;
int main(){
  string myString = "Hello World";
  for (std::size_t i = 0; i < myString.size(); ++i)
  {
      cout << bitset<8>(myString.c_str()[i]) << endl;
  }
}

Output:

answered Apr 17 '12 at 02:25

Jesse Good

50,901
14
124
166

18

Or just `bitset<8>(myString[i])` – Jesse Good Apr 17 '12 at 02:37
2

so bitset<8> would give you base-256, if you want say base-255 or base-257 just add -1 and +1? – pyCthon Jan 02 '13 at 19:34
if we want to sum the outputs such that if there is an overflow bit (0 or 1) at the end of the sum on MSB side, then that should get added to the final answer of the sum again. how can we do that? – user899714 Nov 05 '13 at 21:01
Add some context by explaining how your answer solves the problem in question, instead of posting a code-only answer. – veeloth Jan 18 '23 at 17:53

Mirolim Majidov · Answer 2 · 2019-01-14T09:20:36.210

Try using this with method. Example:

#include <iostream>
#include <bitset>
using namespace std;

string TextToBinaryString(string words) {
    string binaryString = "";
    for (char& _char : words) {
        binaryString +=bitset<8>(_char).to_string();
    }
    return binaryString;
}
int main()
{
    string testText = "Hello World";
    cout << "Test text: " << testText << "!\n";
    cout << "Convert text to binary: " << TextToBinaryString(testText) << "!\n";

    return 0;
}

result code:

Test text: Hello World!                                                                                                                                                                                 
Convert text to binary: 0100100001100101011011000110110001101111001000000101011101101111011100100110110001100100!

score 0 · Answer 3 · answered Dec 24 '19 at 08:17

0

char * buf = data.c_str; //buf is binary

answered Dec 24 '19 at 08:17

Bawantha

3,644
4
24
36

6

Add some context by explaining how your answer solve the problem in question, instead of posting code-only answer. – Arun Vinoth-Precog Tech - MVP Dec 24 '19 at 17:25

Fastest way to Convert String to Binary?

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