Hello,writing codes here
Qt Code: 
  1. //Writing size of map
  2.     uint16_t streamOffset = (sizeof(int)+sizeof(char))*FrekMap.size()+sizeof(uint16_t);
  3.     codefile.write(reinterpret_cast<char*>(&streamOffset),sizeof(uint16_t));
  4.     //Writing map
  5.     for (QMap<char,int>::Iterator it = FrekMap.begin(); it != FrekMap.end(); ++it) {
  6.        codefile.putChar(it.key());
  7.        codefile.write(reinterpret_cast<char*>(&(it.value())), sizeof(int));
  8.     }
  9.     //Writing lenght last byte
  10.     codefile.putChar(compressed.length()%8);
  11.     while(compressed.length()%8!=0)
  12.         compressed.push_back('0');
  13.     //Writing code
  14.     compressedData=compressed.constData();
  15.     for(int i = 0; i < compressed.size(); i++ )
  16.     {
  17.         if( compressedData[i] == ZeroBit )
  18.             k++;
  19.         else if( compressedData[i] == OneBit )
  20.         {
  21.             buff |= bits[k];
  22.             k++;
  23.         }
  24.         if( k == 8 )
  25.         {
  26.             codefile.write(reinterpret_cast<char *>(&buff),sizeof(unsigned char));
  27.             buff = 0;
  28.             k    = 0;
  29.         }
  30.     }
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Reading codes here
Qt Code: 
  1. //read size of map
  2.     readData.read(reinterpret_cast<char*>(&sizeMap),sizeof(sizeMap));
  3.     //read map
  4.     for (int i=sizeof(uint16_t);i<sizeMap;i+=sizeof(int)+sizeof(char)) {
  5.        char charofmap;
  6.        int freq;
  7.        readData.getChar(reinterpret_cast<char*>(&charofmap));
  8.        readData.read(reinterpret_cast<char*>(&freq), sizeof(int));
  9.        FreqTable.insert(charofmap,freq);
  10.     }
  11. //read last byte lenght
  12.     readData.getChar(reinterpret_cast<char*>(&lengthLast));
  13. //read code to bit
  14.     while (!readData.atEnd()) {
  15.         unsigned char ch;
  16.         readData.getChar(reinterpret_cast<char*>(&ch));
  17.         codeLetter+=unschartoQString(ch);
  18.     }
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I can't read true for writing code.Where is my problem?