Compilare: main.cpp: In function 'void add(node&, std::__cxx11::string, int)': main.cpp:18:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==word.size()){ ~^~~~~~~~~~~~~ main.cpp:25:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<current.next.size() && !found){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void del(node&, std::__cxx11::string, int)': main.cpp:41:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==word.size()){ ~^~~~~~~~~~~~~ main.cpp:49:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<current.next.size() && !found){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void aparitii(std::__cxx11::string, node&, int)': main.cpp:60:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==word.size()){ ~^~~~~~~~~~~~~ main.cpp:68:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<current.next.size() && !found){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void prefix(std::__cxx11::string, node&, int)': main.cpp:81:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==word.size()){ ~^~~~~~~~~~~~~ main.cpp:89:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<current.next.size() && !found){ ~^~~~~~~~~~~~~~~~~~~~