/in/foo.cc: In function 'int main()':
/in/foo.cc:9:2: error: expected ',' or ';' before 'for'
  for(i;i<=12;i++)
  ^~~
/in/foo.cc:9:9: warning: statement has no effect [-Wunused-value]
  for(i;i<=12;i++)
        ~^~~~
/in/foo.cc:9:17: error: expected ';' before ')' token
  for(i;i<=12;i++)
                 ^
/in/foo.cc:30:1: error: expected '}' at end of input
 }
 ^