Compilare: user.cpp: In function ‘long long unsigned int div_and_q(int, int, punct*, punct*)’: user.cpp:121:9: warning: unused variable ‘li’ [-Wunused-variable] int li=0, ri=0; ^ user.cpp:121:15: warning: unused variable ‘ri’ [-Wunused-variable] int li=0, ri=0; ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:34:43: 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, BUFF_SIZE, fin); ^