Ошибка: нет доступа к полю класса - C++ - Ответ 14333131

source_file.cpp: In member function ‘Component* Entity::getComponent(size_t)’:
source_file.cpp:76:5: warning: control reaches end of non-void function [-Wreturn-type]

source_file.cpp:337:12: warning: deleting object of polymorphic class type ‘PrimarySystem’ which has non-virtual destructor might cause undefined behaviour [-Wdelete-non-virtual-dtor]
     delete sys;

Warning(s):
source_file.cpp:47:24: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     const size_t getID()
                        ^
source_file.cpp:52:51: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     const bool containComponent(size_t componentID) 
                                                   ^
source_file.cpp:96:36: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     const size_t howManyComponents() {
                                    ^
source_file.cpp:123:24: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     const size_t getID() 
                        ^
source_file.cpp:138:60: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     const bool containProcessedComponent(size_t componentID)
                                                            ^
source_file.cpp:111:7: warning: ‘class System’ has virtual functions and accessible non-virtual destructor [-Wnon-virtual-dtor]
 class System
       ^
source_file.cpp: In member function ‘void World::addEntity(TEntity*)’:
source_file.cpp:175:46: warning: use of old-style cast [-Wold-style-cast]
         if (addingEntity->getID() == (size_t)0)
                                              ^
source_file.cpp: In constructor ‘Entity::Entity()’:
source_file.cpp:23:7: warning: ‘Entity::components_’ should be initialized in the member initialization list [-Weffc++]
 class Entity
       ^
source_file.cpp: In constructor ‘FirstEntity::FirstEntity()’:
source_file.cpp:303:19: note: synthesized method ‘Entity::Entity()’ first required here 
     FirstEntity() {
                   ^
source_file.cpp: At global scope:
source_file.cpp:309:7: warning: base class ‘class System’ has accessible non-virtual destructor [-Wnon-virtual-dtor]
 class PrimarySystem : public System {
       ^
source_file.cpp:309:7: warning: ‘class PrimarySystem’ has virtual functions and accessible non-virtual destructor [-Wnon-virtual-dtor]
source_file.cpp: In constructor ‘System::System()’:
source_file.cpp:111:7: warning: ‘System::processedComponents_’ should be initialized in the member initialization list [-Weffc++]
 class System
       ^
source_file.cpp: In constructor ‘PrimarySystem::PrimarySystem()’:
source_file.cpp:311:21: note: synthesized method ‘System::System()’ first required here 
     PrimarySystem() {
                     ^
source_file.cpp: In constructor ‘World::World()’:
source_file.cpp:156:7: warning: ‘World::systems_’ should be initialized in the member initialization list [-Weffc++]
 class World
       ^
source_file.cpp:156:7: warning: ‘World::entities_’ should be initialized in the member initialization list [-Weffc++]
source_file.cpp:156:7: warning: ‘World::pairSysIDEntID_’ should be initialized in the member initialization list [-Weffc++]
source_file.cpp: In function ‘int main()’:
source_file.cpp:324:30: note: synthesized method ‘World::World()’ first required here 
     World* world = new World();
                              ^
source_file.cpp:337:12: warning: deleting object of polymorphic class type ‘PrimarySystem’ which has non-virtual destructor might cause undefined behaviour [-Wdelete-non-virtual-dtor]
     delete sys;
            ^
source_file.cpp:335:20: warning: ignoring return value of ‘int system(const char*)’, declared with attribute warn_unused_result [-Wunused-result]
     system("pause");
                    ^
source_file.cpp: In member function ‘Component* Entity::getComponent(size_t)’:
source_file.cpp:76:5: warning: control reaches end of non-void function [-Wreturn-type]
     }
     ^