/in/foo.cc: In function 'int main()':
/in/foo.cc:6:66: warning: use of 'll' length modifier with 'f' type character has either no effect or undefined behavior [-Wformat=]
  printf("%.4llf %.4llf %.4llf\n ",2.0*r,2.0*r*3.14159,r*r*3.14159);
                                                                  ^
/in/foo.cc:6:66: warning: use of 'll' length modifier with 'f' type character has either no effect or undefined behavior [-Wformat=]
/in/foo.cc:6:66: warning: use of 'll' length modifier with 'f' type character has either no effect or undefined behavior [-Wformat=]