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Array Queue Implementation: Understanding the Basics

Learn the concept and application of implementing a queue using arrays, with step-by-step examples and explanations. Ideal for beginners in data structures and algorithms.

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Array Queue Implementation: Understanding the Basics

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  1. Queue Implementation with Arrays • QUEUEinit();

  2. Queue Implementation with Arrays front back • QUEUEinit(); MAX_SIZE = 6 Variable q[0] q[1] q[2] q[3] q[4] q[5] Value ? ? ? ? ? ?

  3. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value ? ? ? ? ? ?

  4. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A ? ? ? ? ?

  5. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A ? ? ? ? ?

  6. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D ? ? ? ?

  7. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D ? ? ? ?

  8. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T ? ? ?

  9. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T ? ? ?

  10. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ?

  11. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ?

  12. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ? Items dequeued: A

  13. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ? Items dequeued: A

  14. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ? Items dequeued: A D

  15. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ? Items dequeued: A D

  16. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ? Items dequeued: A D T

  17. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E ? ? Items dequeued: A D T

  18. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E X ? Items dequeued: A D T

  19. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); • QUEUEput('A'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E X ? Items dequeued: A D T

  20. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); • QUEUEput('A'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E X A Items dequeued: A D T

  21. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); • QUEUEput('A'); • QUEUEput('M'); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value A D T E X A Items dequeued: A D T

  22. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); • QUEUEput('A'); • QUEUEput('M'); wrap-around Variable q[0] q[1] q[2] q[3] q[4] q[5] Value M D T E X A Items dequeued: A D T

  23. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); • QUEUEput('A'); • QUEUEput('M'); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value M D T E X A Items dequeued: A D T

  24. Queue Implementation with Arrays front back • QUEUEinit(); • QUEUEput('A'); • QUEUEput('D'); • QUEUEput('T'); • QUEUEput('E'); • QUEUEget(); • QUEUEget(); • QUEUEget(); • QUEUEput('X'); • QUEUEput('A'); • QUEUEput('M'); • QUEUEget(); Variable q[0] q[1] q[2] q[3] q[4] q[5] Value M D T E X A Items dequeued: A D T E

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