Thread: Cryptogram troubles

what you're doing is a rotation code. search google for ROT13, and you'll find lots of info on how to do this.

Hehe thank you!! This should definitely be fun

If you're just adding 1 to each character, this will suffice:

Code:

for_each(s.begin(),s.end(),[](char& c){c++;});

Otherwise make a lookup table, denoting which char to be replaced by what:

Code:

void rep(char& c)//replaces everything with 'a'
{
    bool up_flag(c>='A'&&c<='Z');
    if(up_flag)c=tolower(c);
    static char table[]=
    {
        'a','a','a','a','a',
        'a','a','a','a','a',
        'a','a','a','a','a',
        'a','a','a','a','a',
        'a','a','a','a','a',
        'a'        
    };
    c = table[c-'a'];
    if(up_flag)c=toupper(c);
}
 //call like this:
for_each(s.begin(),s.end(),rep);

Thank you! Unfortunately I have no clue how to use those examples..Hehe, so I am reading up on "Pointers" as we speak(I think that is the right direction?)...I can not figure out how to declare what is being used in the character table.

I appreciate your reply very much but I think it is a bit past what I have learned so far

I would not be opposed to the first way, but would later like to migrate to the table.

Do I use this like so:

Code:

for_each(s.begin(),s.end(),[](char& c){c++;});

Code:

for_each(s.begin(),s.end(),[](char& d){d++;});

Code:

for_each(s.begin(),s.end(),[](char& e){e++;});

etc. so on and so forth?





sorry

Oh...no.

Code:

    for_each(s.begin(),s.end(),[](char& c){c++;});

Suppose you have a string variable s.
The above code replaces character element in s with the next character. EG: "ayc" gets turned into "bzd" .
Think of it like a shorthand for this:

Code:

for(int i=0;i<s.length();i++)
{
    s[i]=s[i]+1;
}

The table on the other hand, replaces characters with those on the table, according to alphabet position. So, the element in the second position replaces 'b' and the last one replaces 'z'.
To use them you need to #include <algorithm> and use a compiler with good C++11 support.

YES! THANK YOU

Just had to replace the 's' with "message" and up and running with the table!

I feel silly now