Compilare: user.cpp: In member function ‘void Hash::erase(int)’: user.cpp:56:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz < H[key].size() && H[key][poz] != val) ^ user.cpp:59:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz < H[key].size()) { ^ user.cpp: In member function ‘bool Hash::find(int)’: user.cpp:69:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz < H[key].size() && H[key][poz] != val) ^ user.cpp:72:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz < H[key].size()) ^ user.cpp: In member function ‘int Hash::count(int)’: user.cpp:81:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < H[key].size();i++) ^ user.cpp: In function ‘char next()’: user.cpp:15:41: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, BUF, fin), pos = 0; ^ user.cpp: In function ‘int main()’: user.cpp:117:5: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(gen <= c) { ^