Exercises 3.4

1. valid

2. invalid; left side must be a variable

3. valid

4. valid

5. invalid; left side must be a single variable

6. valid, but not useful and not recommended

7. valid

8. valid

9. invalid (unless A is a variable name)

10. valid

11. valid

12. valid

13. invalid; ++ is defined only for integers

14. valid

15. 15

16. 7

17. 6

18. 6

19. 0.390625

20. 0

21. 2

22. invalid; can’t assign string to double

23. 10

24. 16

25. 16

26. 64

27. 5

28. number += 77;

29. number -= 3;

30. number += 2 * number;

31. number += number % 10;

32. number -= (int)(xValue);

33. distance = rate * time;

34. xValue += deltaX;

35. resistance = 1 / ((1 / res1) + (1 / res2) + (1 / res3));

36. area = 0.5 * b * h;

37. price = (stockNumber % 1000) / 100.0;

38. tax = (int)(tax + 0.5);