Eroare de compilare: user.cpp: In function ‘void add(Trie*, int)’: user.cpp:26:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p == s.size()) { ^ user.cpp: In function ‘bool discard(Trie*, int)’: user.cpp:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p == s.size()) nd->words--; ^ user.cpp: In function ‘int frequency(Trie*, int)’: user.cpp:55:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p == s.size()) return nd->words; ^ user.cpp: In function ‘int prefixes(Trie*, int)’: user.cpp:60:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int prefixes(Trie *nd, int p) { return (p == s.size() || child == NULL? p : prefixes(child, p+1)); } ^ user.cpp: In function ‘int main()’: user.cpp:65:47: error: expected ‘,’ or ‘;’ before ‘while’ ifstream f("trie.in"); ofstream g("trie.out") while(!f.eof()) { ^