Compilare: main.cpp: In member function 'void trienod::add(int)': main.cpp:19:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth==s.size()) return; ~~~~~^~~~~~~~~~ main.cpp:21:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) x=0; ~~~~~~~^~~~~~~~~~ main.cpp:23:9: warning: array subscript has type 'char' [-Wchar-subscripts] if(v[x]==nullptr) v[x]=new trienod(); ^ main.cpp:23:24: warning: array subscript has type 'char' [-Wchar-subscripts] if(v[x]==nullptr) v[x]=new trienod(); ^ main.cpp:24:6: warning: array subscript has type 'char' [-Wchar-subscripts] v[x]->add(depth+1); ^ main.cpp: In member function 'bool trienod::del(int)': main.cpp:28:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth==s.size()) return !cnt; ~~~~~^~~~~~~~~~ main.cpp:30:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) x=0; ~~~~~~~^~~~~~~~~~ main.cpp:32:9: warning: array subscript has type 'char' [-Wchar-subscripts] if(v[x]->del(depth+1)){ ^ main.cpp:33:14: warning: array subscript has type 'char' [-Wchar-subscripts] delete v[x]; ^ main.cpp:34:7: warning: array subscript has type 'char' [-Wchar-subscripts] v[x]=nullptr; ^ main.cpp: In member function 'int trienod::srcf(int)': main.cpp:39:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth==s.size()) return cnt; ~~~~~^~~~~~~~~~ main.cpp:41:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) x=0; ~~~~~~~^~~~~~~~~~ main.cpp:43:9: warning: array subscript has type 'char' [-Wchar-subscripts] if(v[x]==nullptr) return 0; ^ main.cpp:44:13: warning: array subscript has type 'char' [-Wchar-subscripts] return v[x]->srcf(depth+1); ^ main.cpp: In member function 'int trienod::srcp(int)': main.cpp:47:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) return depth; ~~~~~~~^~~~~~~~~~ main.cpp:49:9: warning: array subscript has type 'char' [-Wchar-subscripts]