/in/foo.cc: In destructor 'Persons::~Persons()':
/in/foo.cc:71:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Person*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |         for (int i = 0; i < personList.size(); i++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~
/in/foo.cc: In member function 'void Persons::printPersons()':
/in/foo.cc:80:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Person*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |         for (int i = 0; i < personList.size(); i++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~