/in/foo.cc: In function 'bool fish(int, int)':
/in/foo.cc:19:17: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if (b[0] == '0'&&len>1 
                  
/in/foo.cc:21:15: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   || len == 3 && b[2] >'5'
      ~~~~~~~~~^~~~~~~~~~~~
/in/foo.cc:22:15: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   || len == 3 && b[1] >'5')
      ~~~~~~~~~^~~~~~~~~~~~