/in/foo.cc: In member function 'void SeqList::FindiSecondMax()':
/in/foo.cc:36:13: warning: variable 'max2' set but not used [-Wunused-but-set-variable]
         int max2;
             ^~~~
/in/foo.cc:61:31: warning: 'p2' may be used uninitialized in this function [-Wmaybe-uninitialized]
         if (data[p] == data[p2]) {
                               ^
/in/foo.cc:61:19: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
         if (data[p] == data[p2]) {
                   ^
/in/foo.cc:62:23: warning: 'p3' may be used uninitialized in this function [-Wmaybe-uninitialized]
             cout << p3;
                       ^