Q

Query, 638

• << (output operator), 641

• & (bitwise AND), 638

• definition, 644

• | (bitwise OR), 638

• definition, 644

• ~ (bitwise NOT), 638

• definition, 643

• classes, 636–639

• definition, 640

• interface class, 637

• operations, 635

• program, 635

• recap, 640

Query_base, 636

• abstract base class, 636

• definition, 639

• member function, 636

QueryResult, 485

• class definition, 489

• nested class, 844

• constructor, 845

• print, 490

queue, 371, 373

• back, 371

• emplace, 371

• empty, 371

• equality and relational operators, 370

• front, 371

• header, 371

• initialization, 369

• pop, 371

• push, 371

• sequential container, 371

• size, 371

• swap, 371

Quote

• class definition, 594

• design, 592