Compilare: user.cpp: In function ‘void add(trie*&, int)’: user.cpp:33:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( poz == cuv.size() ) ^ user.cpp: In function ‘int main()’: user.cpp:76:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i <= s.size() ; i++ ) ^ user.cpp:96:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 1; i <= s.size(); i++ ) ^