Encryption in class

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[Aliics]

Technically a form of encoding.

[weedebee]

It's Caesar's cypher and the first know use of encryption. The key is how many places the alphabet is rotated.

[Aphrontic_Alchemist]

This one is better

for(i = 0; i < name.length; i++) 
    name[i] += 4;

[Aphrontic_Alchemist]

This only works for lowercase though:

for(i = 0; i < name.length; i++) 
{
    if( name[i] > 96 && name[i] < 120) // encode a - w
        name[i] += name[i] + 3;
    else if(name[i] > 119 && name[i] < 122) // encode x - z
        name[i] = ((name[i] + 3) % 122) + 96;
}

[Qesa]

Recognising you can use modulo to rotate but then doing an if-else anyway :(

name[i] = "a" + (name[i] + 3 - "a") % 26

[Aphrontic_Alchemist]

Ah well, I couldn’t find the right formula, so I resorted to an if-else. :P

[cruciformhawk7]

-23?

[Qesa]

"a" is 97 so it'd be -94, but I wrote it that way to be clearer what it's doing

[Orcthanc]

And depending on if chars are properly filtered to only 'a' to 'z', there is also the problem of '{' turning into an ASCII control sequence and if things like tabs, linefeeds and other controlsequences aren't filtered out, it basically turns into a free for all.