Compilare: main.cpp: In function 'void remove_value(int, int, int)': main.cpp:96:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < stk.size(); ++i) if (stk[i].y == mx) { ~~^~~~~~~~~~~~ main.cpp: In member function 'char InParser::nextch()': main.cpp:25:28: 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, BMAX, fi); ^