Compilare: main.cpp: In member function 'void trienod::add()': main.cpp:18:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth==s.size()) return; ~~~~~^~~~~~~~~~ main.cpp:20:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) x=0; ~~~~~~~^~~~~~~~~~ main.cpp: In member function 'bool trienod::del()': main.cpp:27:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth==s.size()) return !cnt; ~~~~~^~~~~~~~~~ main.cpp:29:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) x=0; ~~~~~~~^~~~~~~~~~ main.cpp: In member function 'int trienod::srcf()': main.cpp:38:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth==s.size()) return cnt; ~~~~~^~~~~~~~~~ main.cpp:40:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) x=0; ~~~~~~~^~~~~~~~~~ main.cpp: In member function 'int trienod::srcp()': main.cpp:46:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth+1==s.size()) return depth; ~~~~~~~^~~~~~~~~~