#include <string>
#include <vector>

namespace cr
{
    struct detailsCrypt
    {
        std::vector<unsigned short> rnd_numbers_key;
        std::vector<unsigned short> rnd_numbers_2byte;
        std::vector<unsigned short> rnd_numbers_4byte;
    };

    class Crypt
    {
        public:

        std::string create_key() const;
        unsigned short transform_key(const std::string &key) const;
        unsigned short transform_key(const std::string &key, const std::vector<unsigned short> &random_numbers) const;
        unsigned short downsize_key(unsigned short raw_key) const;

        private:
        detailsCrypt cd_data;
    };
}

Crypt.cpp

#include <string>
#include <vector>
#include "crypt.hpp"
#include "random.hpp"
using namespace std;
using namespace rd;

namespace cr
{
    string Crypt::create_key() const
    {
        string key;
        for(int i=0;i<6;++i)
        {
            char temp=randomize.rnd(97,122);
            key +=temp;
        }
        return key;
    }

    unsigned short Crypt::transform_key(const string &key) const
    {
        unsigned short amount=0;
        for(int i=0;i<6;++i)
        {
            cd_data.rnd_numbers_key.push_back(randomize.rnd(123,1000)); //<-- ???
            amount +=cd_data.rnd_numbers_key.back() - key[i];
        }
        return amount;
    }

    unsigned short Crypt::transform_key(const string &key, const vector<unsigned short> &random_numbers) const
    {
        unsigned short amount=0;
        for(int i=0;i<6;++i)
        {
            amount +=random_numbers[i] - key[i];
        }
        return amount;
    }

    unsigned short Crypt::downsize_key(unsigned short raw_key) const
    {
        if(raw_key < 12)
        {
            raw_key +=12;
        }

        if((raw_key % 12) == 0)
        {
            raw_key /=12;
        }
        else
        {
            raw_key = ((raw_key - (raw_key % 12)) / 12);
        }

        return raw_key;
    }
}

Ich schaus schon nä viertel Stunde an, check aber nicht warums nicht funzt.

ERROR:
Compiling: crypt.cpp
crypt.cpp: In member function short unsigned int cr::Crypt::transform_key(const std::string&) const': crypt.cpp:27: error: no matching function for call tostd::vector<short unsigned int, std::allocator<short unsigned int> >::push_back(short int) const'
H:/Programme/CodeBlocks/bin/../lib/gcc/mingw32/3.4.4/../../../../include/c++/3.4.4/bits/stl_vector.h:557: note: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = short unsigned int, _Alloc = std::allocator<short unsigned int>] <near match>
Process terminated with status 1 (0 minutes, 0 seconds)

MfG
Stromberg