Compilare: user.cpp: In function ‘int main()’: user.cpp:135:13: warning: unused variable ‘d1’ [-Wunused-variable] int d1 = dst( v, c ), d2 = dst( c, d ), d3 = dst( v, d ); ^ user.cpp:135:31: warning: unused variable ‘d2’ [-Wunused-variable] int d1 = dst( v, c ), d2 = dst( c, d ), d3 = dst( v, d ); ^ user.cpp:135:49: warning: unused variable ‘d3’ [-Wunused-variable] int d1 = dst( v, c ), d2 = dst( c, d ), d3 = dst( v, d ); ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: 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); ^