delta              52 WordTree.cpp       int delta; // 語／行アドレスの差分
delta              61 WordTree.cpp                       delta = std::abs
delta              63 WordTree.cpp                       if ((delta <= dist) && (delta != 0))
delta              72 WordTree.cpp                       delta = std::abs
delta              74 WordTree.cpp                       if ((delta <= dist) && (delta != 0))