splitter.cpp

#include <cstdlib>
#include <string>
#include <iostream>
#include <vector>
#include <cmath>

using namespace std;

struct Bit {
    unsigned b0:1, b1:1, b2:1, b3:1, b4:1, b5:1, b6:1, b7:1;
};
union CharBit {
    char byte;
    Bit bits;
};

vector<string> split ( string str ) {
    vector<string> tmp;
    int last = 0;
    for (int i = 0; i < str.size(); ++i) {
        if ( str[i] == '#' ) {
            tmp.push_back( str.substr( last, i - last ) );
            last = i+1;
        }
        if (tmp.size() < 1)
            continue;
        if (tmp.back().size() != 8)
            tmp.pop_back();
    }
    return tmp;
}

string decodestr ( string str ) {
    string s = "";
    //--------------------------------
    vector<string> pole = split ( str );
    //--------------------------------
    for (int i = 0; i < pole.size(); ++i) {
        //----------------------------
        char c = 0;
        unsigned char sub = 128;
        for (int j = 0; j < 8; ++j) {
            if (pole[i][j] == '1') {
                c += sub;
            }
            sub = sub / 2;
            //sub = sub >> 1;
        }
        s+=c;
        //-----------------------------
        /*char c = 0;
        for (int j = 0; j < 8; ++j) {
            if (pole[i][j] == '1') {
                c += pow(2,7-j);
            }
        }
        s+=c;*/
        //-----------------------------
        /*CharBit byte;
        byte.bits.b0 = pole[i][7] - 48;
        byte.bits.b1 = pole[i][6] - 48;
        byte.bits.b2 = pole[i][5] - 48;
        byte.bits.b3 = pole[i][4] - 48;
        byte.bits.b4 = pole[i][3] - 48;
        byte.bits.b5 = pole[i][2] - 48;
        byte.bits.b6 = pole[i][1] - 48;
        byte.bits.b7 = pole[i][0] - 48;
        s+=byte.byte;*/
        //-----------------------------
    }
    return s;
}

string decodestr2 (string str) {
    string s = "";
    string tmp;
    int last;
    for (int i = 0; i < str.size(); ++i) {
        if ( str[i] == '#' ) {
            tmp = str.substr( last, i - last );
            last = i+1;

            if (tmp.size() == 8) {
                //----------------------------
               char c = 0;
               unsigned char sub = 128;
               for (int j = 0; j < 8; ++j) {
                   if (tmp[j] == '1') {
                       c += sub;
                   }
                   sub = sub / 2;
                   //sub = sub >> 1;
               }
               s+=c;
               //-----------------------------
               /*char c = 0;
               for (int j = 0; j < 8; ++j) {
                   if (tmp[j] == '1') {
                       c += pow(2,7-j);
                   }
               }
               s+=c;*/
               //-----------------------------
            }
        }
    }
    return s;
}


int main(int argc, char** argv) {
    string vstup = "#01010101#011110#01010101#";
    cout << decodestr2 (vstup) << endl;
}