Compilare: main.cpp: In function 'int main()': main.cpp:149:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cb.size() && arbore; ++i){ ~~^~~~~~~~~~~ main.cpp:150:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < cb[i].size() && arbore; ++j){ ~~^~~~~~~~~~~~~~ main.cpp:153:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = j + 1; k < cb[i].size() && arbore; ++k){ ~~^~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:26:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^