Compilare: user.cpp: In function ‘void add(nod*, int)’: user.cpp:25:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == s.size()) node->valapar ++; ^ user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == s.size()) return; ^ user.cpp: In function ‘void erase(nod*, int)’: user.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == s.size()) node->valapar--; ^ user.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == s.size()) return; ^ user.cpp: In function ‘int nrapar(nod*, int)’: user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == s.size()) return node->valapar; ^ user.cpp: In function ‘int prefix(nod*, int)’: user.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == s.size()) return poz; ^