Snippet ascii->hex->binary

Does anybody have a snippet for converting a string from ascii to hex and then each character in hex to binary?

This would be greatly appriciated.

No this isn't schoolwork, I am currently working on an encryption program.

Thank you for even reading this thread.

Do you mean something like:

Code:

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

int main()
{
    string str = "abcdefghijkl";

    for( string::iterator itr = str.begin(); itr != str.end(); ++itr )
        cout << *itr << " = " << hex << static_cast<int>(*itr)
             << ' ' << bitset<8>(*itr) << endl;

    return 0;
}

Output:

Code:

a = 61 01100001
b = 62 01100010
c = 63 01100011
d = 64 01100100
e = 65 01100101
f = 66 01100110
g = 67 01100111
h = 68 01101000
i = 69 01101001
j = 6a 01101010
k = 6b 01101011
l = 6c 01101100

[edit]oops, forgot the using namespace std; part[/edit]

Ahhhh, a work of art.

basically I want it to convert A to 41 and then 4 to 0100 and 1 to 0001

Originally Posted by bikr692002

basically I want it to convert A to 41 and then 4 to 0100 and 1 to 0001

You mean just like hk_mp5kpdw showed? And if you are not talking about the text representation as an output, that in fact you mean to "do this in binary", then the whole thing is a no-op and you need to first understand representations and values.

yeah, but I want the function to return the whole string converted to binary to the main program

Use a stringstream in a similar fashion and return the string?

Code:

#include <iostream>
#include <sstream>
#include <string>
#include <bitset>

std::string foo(char letter)
{
    std::ostringstream oss;
    oss << std::bitset<8>(letter);
    return oss.str();
}

int main()
{
    char letter = 'A';
    std::string result = foo(letter);
    std::cout << letter << " -> " << result << std::endl;
    return 0;
}

/* my output
A -> 01000001
*/

Ok, I don't know if I'm understanding you
Heres my code (I'm just learning the time functions so They are completely wrong)

Code:

#include <iostream>
#include <time.h>
int main()
{
    char UserInput[1024];
    char DecryptedInput[1024];
    char Option[1];
    int UserInputToBinary;
    int Time;
    int EncryptedString;
    int Day;
    int Month;
    
    std::cout<<"Please press E to encrypt, D to decrypt";
    std::cin>>Option;
    if (Option)
    {
                 std::cout<<"Please enter string to be enrypted: ";
                 std::cin>>UserInput;
                 Time=struct tm *localtime( const time_t *tm_hour );
                 Time=Time*3600;
                 Day=struct tm *localtime( const time_t *tm_mday );
                 Month=struct tm *localtime( const time_t *tm_mon );
                 Year=struct tm *localtime( const time_t *tm_year );
                 std::cout<<"Please save this, this is key1: "<<Time;
                 std::cout<<" Key2: "<<Day<<" Key3: "<<Month;<<" Key4: "<<Year;
                 ConvertE(UserInput);
                 UserInputToBinary=UserInput;
                 EncryptedString=UserInputToBinary*3.14358/Time*Year/10.9574/Day*Month;
                 std::cout<<"The encrypted string is: "<<EncryptedString;
                 std::cin.get();
                 return 0;
    }
    if (Option=D)
    {
                 /*std::cout>>"Please enter string to be decrypted: ";
                 std::cin<<UserInput;
                 std::cout>>"\nPlease enter key1: ";
                 std::cin<<Time;
                 std::cout>>"\nPlease enter key2: ";
                 std::cin<<Day;
                 std::cout>>"\nPlease enter key3: ";
                 std::cin<<Month;
                 std::cout>>"\nPlease enter key4: ";
                 std::cin<<Year;
                 UserInputToBinary=Month/Day*10.9574*Year/Time*3.14358/UserInput;
                 ConvertD(UserInputToBinary);
                 DecryptedInput=UserInputToBinary;
                 std::cout>>"\nThe decrypted message is: ">>DecryptedInput;
                 */std::cin.get();
                 return 0;
    }
    return 0;
}

and the ConvertE and ConvertD are what I'm trying to do, they are in a seperate header.

Originally Posted by Dave_Sinkula

Use a stringstream in a similar fashion and return the string?

Code:

#include <iostream>
#include <sstream>
#include <string>
#include <bitset>

std::string foo(char letter)
{
    std::ostringstream oss;
    oss << std::bitset<8>(letter);
    return oss.str();
}

int main()
{
    char letter = 'A';
    std::string result = foo(letter);
    std::cout << letter << " -> " << result << std::endl;
    return 0;
}

/* my output
A -> 01000001
*/

Theproblem with that is that it returns the value of A, not the two hex value bites into binary like i.e. A->E2(i know not real vaalue)and have it convert to (Its incorrect) 0110 0010 instead of 0100001