/in/foo.cc: In function 'void workk()':
/in/foo.cc:45:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(register int i=1;i<dl[0];i++){//在multiset中找一下 
                       ~^~~~~~
/in/foo.cc: In function 'void workk2()':
/in/foo.cc:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(register int i=1;i<dl[0];i++){
                       ~^~~~~~