/in/foo.cc: In function 'int main()':
/in/foo.cc:7:5: error: unable to find numeric literal operator 'operator""x'
  if(0.05x<5)
     ^~~~~
/in/foo.cc:7:5: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
/in/foo.cc:10:33: error: unable to find numeric literal operator 'operator""x'
   cout<<fixed<<setprecision(2)<<0.95x;
                                 ^~~~~
/in/foo.cc:10:33: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes