foo.cc:6:2: error: expected initializer before 'int'
  int year;
  ^~~
foo.cc:7:2: error: 'cin' does not name a type
  cin>>year;
  ^~~
foo.cc:8:2: error: expected unqualified-id before 'if'
  if(year%400==0||(year%4==0&&year%100!=0)) 
  ^~
foo.cc:12:6: error: expected unqualified-id before 'else'
      else  
      ^~~~
foo.cc:16:2: error: expected unqualified-id before 'return'
  return 0;
  ^~~~~~
foo.cc:17:5: error: expected declaration before '}' token
     }
     ^

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