/in/foo.cc: In function 'bool f(std::__cxx11::string)':
/in/foo.cc:18:39: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (!(str[i] == '.' || str[i] >= '0'&&str[i] <= '9'))
                                        
/in/foo.cc:20:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (str[i] >= '0'&&str[i] <= '9'||i==n-1)