Compilare: user.cpp: In function ‘void adunare(nod*, int)’: user.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==strlen(cuv)-1) ^ user.cpp: In function ‘int scadere(nod*, int)’: user.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==strlen(cuv)-1) ^ user.cpp: In function ‘void nr_aparitii(nod*, int)’: user.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==strlen(cuv)-1) ^ user.cpp: In function ‘void lung_max(nod*, int)’: user.cpp:66:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==strlen(cuv)-1) ^ user.cpp: In function ‘int scadere(nod*, int)’: user.cpp:48:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:79:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trie.in", "r", stdin); ^