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";
}

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
– Sergey Kalinichenko, Commented Apr 17, 2012 at 2:15
So what have you tried - the code that you have does not even compile... — Alexei Levenkov
– Alexei Levenkov, Commented Apr 17, 2012 at 2:27

Jesse Good · Accepted Answer · 2012-04-17 02:25:25Z

46

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, 2012 at 2:25

Jesse Good

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4 Comments

Jesse Good Over a year ago

Or just bitset<8>(myString[i])

pyCthon Over a year ago

so bitset<8> would give you base-256, if you want say base-255 or base-257 just add -1 and +1?

user899714 Over a year ago

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?

veeloth Over a year ago

Add some context by explaining how your answer solves the problem in question, instead of posting a code-only answer.

Mirolim Majidov · Accepted Answer · 2019-01-14 09:20:36Z

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!

Bawantha · Accepted Answer · 2019-12-24 08:17:17Z

0

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

answered Dec 24, 2019 at 8:17

Bawantha

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1 Comment

Arun Vinoth PrecogTechnologies Over a year ago

Add some context by explaining how your answer solve the problem in question, instead of posting code-only answer.

Tejas M · Accepted Answer · 2023-12-22 04:48:30Z

-1

`QString StringToBinary::toBinary(QString s) { QString bin = "";

for (int i = 0; i < s.size(); ++i)
{
    bin += QString::fromStdString(std::bitset<8>(s.at(i).unicode()).to_string());

} qDebug()<<bin;

return bin;

}`

answered Dec 22, 2023 at 4:48

Tejas M

112 bronze badges

3 Comments

Mark Ransom Over a year ago

I see nothing in the question to indicate the asker has any idea what a QString is. It's certainly not part of standard C++.

Tejas M Over a year ago

It's not a part of C++ but it is used in QTC++ as a String datatype

Mark Ransom Over a year ago

Then your answer should explain that, and also explain why it's a better solution.

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