Added getRandInterval funstion. Full support of dictionaries with multiple definitions of one word.

src/crossgen.cpp

@@ -1,5 +1,5 @@
 #include "crossgen.hpp"
-
+//TODO: fix crash when genereates crossword in debug mode with floating-point error
 
 const wxChar      CELL_CLEAR     = wxT('+');
 const wxChar      CELL_BORDER    = wxT('-');

src/crossgen.hpp

@@ -51,4 +51,9 @@ bool procCross(
 void generateCross(const GridType &grid, const AllWordsType &words, 
     const CharsTransType &trans_type, std::vector<wxString> &words_out);
 
+template <class InputIterator>
+InputIterator getRandInterval(const InputIterator first, const InputIterator last){
+    auto d = std::distance(first, last);
+    return next(first, rand() % d);
+}
 #endif // CROSSGEN_HPP