foo.cc:12:12: warning: 'judgement' initialized and declared 'extern'
 extern int judgement=0;
            ^
foo.cc: In function 'bool isInteger(char*)':
foo.cc:81:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=1;i<len;i++)
                      ^
foo.cc:86:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(k==len-1)
             ^
foo.cc:92:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0;i<len;i++)
                      ^
foo.cc:97:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(k==len)
             ^

自豪的采用 HydroJudger 进行评测(github.com/hydro-dev/HydroJudger)

{"receive":"2020-04-14T09:56:37.098Z","handle":"2020-04-14T09:56:37.098Z","done":"2020-04-14T09:56:37.947Z"}