Thread: Representation of string "2b" in binary

Consider "2b" as a character array.
I think it should be 10 1100010 in binary.
Is this wrong ? I am not sure !
Kindly guide.

I believe it's like so:

Code:

        2         b        \0 
0011 0010|0110 0010|0000 0000|

You could also implement some code to display your values in binary:

Code:

#include <stdio.h>
#include <string.h>

int main(void) {
        const char *hex = "2b";
        int i = 0, j = 0;
        unsigned char test = 128;

        for(i=0; i<strlen(hex) + 1; i++) {
                printf("hex[%d]: %c ", i, hex[i]);
                for(j=0; j<8; j++) {
                        if(hex[i] & test)
                                printf("1");
                        else
                                printf("0");
                        test = test >> 1;
                }
                printf("\n");
                test = 128;
        }

        return 0;
}

Originally Posted by matrixx333

You could also implement some code to display your values in binary:

Many thanks to you for the program, I shall try it out tomorrow !

Originally Posted by msh

I believe it's like so:

Code:

        2         b        \0 
0011 0010|0110 0010|0000 0000|

Thanks for bothering !
Kindly explain why do you think '2' should be represented like '0011 0010' and not like '10' !
I mean how is the char array effecting the binary representation of 2 ?

Thanks again, what is formula to know the binary representation of character 2 ? I aware of the formula for integer 2 !

Now I feel bad for giving you the code instead of encouraging you to figure it out. It's important that you understand how the code works, not just to "use it".

Bloody hell. -_-

Originally Posted by laserlight

I think that you should have specified that you were trying to represent 0x2b in a binary representation. msh interpreted "2b" as two ASCII characters.

I think msh has interpreted it correctly, I had actually memcpyed, "2b" in a char array, and now I want to understand the formula for representing that '2' in binary.

Originally Posted by matrixx333

Now I feel bad for giving you the code instead of encouraging you to figure it out. It's important that you understand how the code works, not just to "use it".

There is no need to feel bad for anything, I don't cram code without understanding it ! I shall definitely try to understand how it works.

Originally Posted by laserlight

Ah. So, you claim that you know how to represent 2 in binary right? As such, you presumably know how to represent 50 in binary. As was already pointed out to you, '2' has a value of 50 in ASCII, so you're done.

Perhaps you are referring to your Post number 7, in which you said "you could use a table". I couldn't understand that you meant "'2' has a value of 50 in ASCII".

Thanks for pointing out again.

Originally Posted by msh

There really isn't a formula for it. It's sort of arbitrary. Any ASCII table worth its name should have a character and its corresponding decimal code listed. Like already pointed out, the binary representation of any ASCII character is that of it's corresponding decimal code.

Thanks again for explaining ! :hattip: