Didactic XOR

[adum]

dsaf

[Rbimas37]

Had no idea what this XOR business is all about at school. But now I do understand a bit, love this site

[wynk]

My solution in ruby:

Code: Select all

input = ["9f", "c7"]
input.map! {
	|x| x.to_i(16)
}
output = input.first ^ input.last
puts output.chr

[lortedy]

Use "calc.exe" in Scientific mode. Select Hex as numeration base then XOR 9f with c7.
=> 58 which converted to ASCII = 'X'

Python:

Code: Select all

a = 0x9f
b = 0xc7
print chr(a^b)

=> X

[meber]

XOR -- this is Exclusive OR

Take your numbers
Convert to binary first on top of the second
Anywhere there is a 1 or 0 then it is a 1
Anywhere there is a 1 and 1 or 0 and 0 then it is a 0

[derplumps]

My solution in ruby:

Code: Select all

input = ["9f", "c7"]
input.map! {
	|x| x.to_i(16)
}
output = input.first ^ input.last
puts output.chr

Python is faster:

Code: Select all

"%c"%(0x9f ^ 0xc7)

[akitta]

Use "calc.exe" in Scientific mode. Select Hex as numeration base then XOR 9f with c7.
=> 58 which converted to ASCII = 'X'

Python:

Code: Select all

a = 0x9f
b = 0xc7
print chr(a^b)

=> X

I don't know if i missed something here, But I used the same method 'calc.exe'
I got 58 but in ascii 58 = :
so i tried : and it was a error.
I converted it to .decimal and it was 88(x)
Which worked.
So isn't 58 on ascii table this symbol : ??

[muffinman9]

I solved this puzzle by hand ;-;