---

Lỗi biên dịch:

Main.cc: In function ‘int main()’:
Main.cc:16:35: warning: format ‘%lf’ expects argument of type ‘double’, but argument 2 has type ‘int’ [-Wformat=]
  printf("%0.5lf\n", count, sum * 4);
                                   ^
Main.cc:16:35: warning: too many arguments for format [-Wformat-extra-args]
Main.cc:17:2: error: ‘reurn’ was not declared in this scope
  reurn 0;    
  ^~~~~
Main.cc:17:2: note: suggested alternative: ‘rewind’
  reurn 0;    
  ^~~~~
  rewind