This document discusses repetition structures in C programming, including while, for, and do-while loops. It covers the basic components of loops, different types of loops, and common errors. Key topics include using while loops to compute sums and averages, using for loops with initializing, testing, and altering expressions, applying different loop programming techniques, and nesting loops within each other.

1. A First Book of ANSI C Fourth Edition Chapter 5 Repetition

6. Pretest and Posttest Loops

7. Pretest and Posttest Loops (continued)

9. Basic Loop Structures

11. The while Statement (continued)

12. The while Statement (continued) Output is: 1 2 3 4 5 6 7 8 9 10

13. The while Statement (continued) Output is: 10 9 8 7 6 5 4 3 2 1

14. The while Statement (continued) Output is: NUMBER SQUARE CUBE ------ ------ ---- 1 1 1 2 4 8 3 9 27 4 16 64 5 25 125 6 36 216 7 49 343 8 64 512 9 81 729 10 100 1000

15. Condition-controlled loop Output is: DEGREES DEGREES CELSIUS FAHRENHEIT ------- ---------- 5 41.00 10 50.00 15 59.00 20 68.00 25 77.00 30 86.00 35 95.00 40 104.00 45 113.00 50 122.00 The while Statement (continued)

16. Computing Sums and Averages Using a while Loop

17. Computing Sums and Averages Using a while Loop (continued)

18. Computing Sums and Averages Using a while Loop (continued)

19. Computing Sums and Averages Using a while Loop (continued)

20. Ensures that any previous value present in the storage locations assigned to the variable total is overwritten and the total starts at a correct value Accumulating statement Computing Sums and Averages Using a while Loop (continued)

21. Calculating an average Computing Sums and Averages Using a while Loop (continued)

23. Sentinels (continued)

25. Sentinels (continued)

26. Sentinels (continued)

31. The for Statement (continued)

33. The for Statement (continued)

34. The for Statement (continued)

35. The for Statement (continued) Comma-separated list

36. The for Statement (continued) (compare with Program 5.3)

37. Computing Sums and Averages Using a for Loop

39. Technique 1: Selection within a Loop

40. Technique 2: Input Data Validation Same code used in lines 6-7!

41. Technique 2: Input Data Validation (continued)

42. Technique 3: Interactive Loop Control

43. Technique 4: Evaluating Equations

44. Technique 4: Evaluating Equations (continued)

45. Nested Loops

47. Nested Loops (continued)

48. Nested Loops (continued)

49. The do-while Statement

52. The do-while Statement (continued)

55. Common Compiler Errors