/in/foo.cc:7:19: error: stray '\357' in program
  double PI=3.14159；
                   ^
/in/foo.cc:7:20: error: stray '\274' in program
  double PI=3.14159；
                    ^
/in/foo.cc:7:21: error: stray '\233' in program
  double PI=3.14159；
                     ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:8:3: error: expected ',' or ';' before 'cin'
   cin>>h>>r;
   ^~~
/in/foo.cc:9:2: error: 'cout' was not declared in this scope
  cout<<ceil(20000/(PI*r*r*h));
  ^~~~
/in/foo.cc:9:2: note: suggested alternative:
In file included from /in/foo.cc:1:0:
/usr/include/c++/6/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^~~~
/in/foo.cc:9:29: error: 'ceil' was not declared in this scope
  cout<<ceil(20000/(PI*r*r*h));
                             ^
/in/foo.cc:10:2: error: 'retuurn' was not declared in this scope
  retuurn 0;
  ^~~~~~~