Compilare: user.cpp:44:21: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] }fin("summax.in","r"); ^ user.cpp:44:21: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] user.cpp: In member function ‘void Input_Reader::Advance()’: user.cpp:18:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,NCHAR,in); ^ user.cpp: In constructor ‘Input_Reader::Input_Reader(char*, char*)’: user.cpp:29:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,NCHAR,in); ^