| 1. | printf: display message by format | | |
| 2. | Output char | | |
| 3. | print the ASCII code for c | | |
| 4. | print character with ASCII 90 | | |
| 5. | print ivalue as octal value | | |
| 6. | print lower-case hexadecimal | | |
| 7. | print upper-case hexadecimal | | |
| 8. | minimum width 1 | | |
| 9. | minimum width 5, right-justify | | |
| 10. | minimum width 5, left-justify | | |
| 11. | 33 non-null, automatically | | |
| 12. | 31 non-null, automatically | | |
| 13. | minimum 5 overridden, auto 33 | | |
| 14. | minimum width 38, right-justify | | |
| 15. | minimum width 38, left-justify | | |
| 16. | default ivalue width, 4 | | |
| 17. | printf ivalue with + sign | | |
| 18. | minimum 3 overridden, auto 4 | | |
| 19. | minimum width 10, right-justify | | |
| 20. | minimum width 10, left-justify | | |
| 21. | right justify with leading 0's | | |
| 22. | using default number of digits | | |
| 23. | minimum width 20, right-justify | | |
| 24. | right-justify with leading 0's | | |
| 25. | minimum width 20, left-justify | | |
| 26. | minimum width 19, print all 17 | | |
| 27. | prints first 2 chars | | |
| 28. | prints 2 chars, right-justify | | |
| 29. | prints 2 chars, left-justify | | |
| 30. | using printf arguments | | |
| 31. | width 10, 8 to right of '.' | | |
| 32. | width 20, 2 to right-justify | | |
| 33. | 4 decimal places, left-justify | | |
| 34. | decimal places, right-justify | | |
| 35. | width 20, scientific notation | | |
| 36. | printf %s for string | | |
| 37. | printf %d for integer | | |
| 38. | printf %ld for long integer number | | |
| 39. | printf %10d, %10.f | | |
