/in/foo.cc:14:1: error: stray '##' in program
 ### 定义链表类
 ^~
/in/foo.cc:14:3: error: stray '#' in program
 ### 定义链表类
   ^
/in/foo.cc:14:5: error: stray '\345' in program
 ### 定义链表类
     ^
/in/foo.cc:14:6: error: stray '\256' in program
 ### 定义链表类
      ^
/in/foo.cc:14:7: error: stray '\232' in program
 ### 定义链表类
       ^
/in/foo.cc:14:8: error: stray '\344' in program
 ### 定义链表类
        ^
/in/foo.cc:14:9: error: stray '\271' in program
 ### 定义链表类
         ^
/in/foo.cc:14:10: error: stray '\211' in program
 ### 定义链表类
          ^
/in/foo.cc:14:11: error: stray '\351' in program
 ### 定义链表类
           ^
/in/foo.cc:14:12: error: stray '\223' in program
 ### 定义链表类
            ^
/in/foo.cc:14:13: error: stray '\276' in program
 ### 定义链表类
             ^
/in/foo.cc:14:14: error: stray '\350' in program
 ### 定义链表类
              ^
/in/foo.cc:14:15: error: stray '\241' in program
 ### 定义链表类
               ^
/in/foo.cc:14:16: error: stray '\250' in program
 ### 定义链表类
                ^
/in/foo.cc:14:17: error: stray '\347' in program
 ### 定义链表类
                 ^
/in/foo.cc:14:18: error: stray '\261' in program
 ### 定义链表类
                  ^
/in/foo.cc:14:19: error: stray '\273' in program
 ### 定义链表类
                   ^
/in/foo.cc: In member function 'int PolyLinkList::evaluate(int)':
/in/foo.cc:83:35: error: 'pow' is not a member of 'std'
             result += cur->coef * std::pow(x, cur->exp);
                                   ^~~