/in/foo.cc: In member function 'void* LinkList::InterSet(LinkList&, LinkList&)':
/in/foo.cc:49:2: warning: no return statement in function returning non-void [-Wreturn-type]
  }
  ^
/in/foo.cc: In function 'int test1()':
/in/foo.cc:100:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'int test2()':
/in/foo.cc:119:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^