Compilare: user.cpp: In function ‘void add(node*, int, std::string)’: user.cpp:25:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz < sir.size()) ^ user.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == sir.size()) ^ user.cpp: In function ‘int rmv(node*, int, std::string)’: user.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz < sir.size()) ^ user.cpp:35:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == sir.size()){ ^ user.cpp: In function ‘int cnt(node*, int, std::string)’: user.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz < sir.size() && r->v[sir[poz] - 'a'] == NULL) ^ user.cpp:55:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz < sir.size()) ^ user.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == sir.size()) ^ user.cpp: In function ‘int prefix(node*, int, std::string, int)’: user.cpp:62:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r->v[sir[poz] - 'a'] != NULL && poz <= sir.size()) ^ user.cpp: In function ‘int cnt(node*, int, std::string)’: user.cpp:59:1: warning: control reaches end of non-void function [-Wreturn-type] } ^