foo.cc: In member function 'void seqlist::removenegative(int)':
foo.cc:17:13: warning: statement has no effect [-Wunused-value]
   17 |         for(it;it!=list.end();it++)
      |             ^~
foo.cc: In member function 'void seqlist::searchremove(int)':
foo.cc:31:13: warning: statement has no effect [-Wunused-value]
   31 |         for(it;it!=list.end();it++)
      |             ^~
foo.cc:29:13: warning: unused variable 'move' [-Wunused-variable]
   29 |         int move=0;
      |             ^~~~
foo.cc: In member function 'void seqlist::output()':
foo.cc:40:13: warning: statement has no effect [-Wunused-value]
   40 |         for(it;it!=list.end();it++)
      |             ^~