Compilare: main.cpp: In function 'int interclasare(int, int, int, int)': main.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In constructor 'InputReader::InputReader(const char*)': main.cpp:9:43: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ main.cpp: In member function 'void InputReader::advance()': main.cpp:31:47: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^