0x11. C - printf

Tasks

0. I'm not going anywhere. You can print that wherever you want to. I'm here and I'm a Spur for life

• Write a function that produces output according to a format.

• Prototype: int _printf(const char *format, ...);
• Returns: the number of characters printed (excluding the null byte used to end output to strings)
• write output to stdout, the standard output stream-
• format is a character string. The format string is composed of zero or more directives. See man 3 printf for more detail. You need to handle the following conversion specifiers:
  • c
  • s
  • %
• You don’t have to reproduce the buffer handling of the C library printf function
• You don’t have to handle the flag characters
• You don’t have to handle field width
• You don’t have to handle precision
• You don’t have to handle the length modifiers

Solution: printf

1. Education is when you read the fine print. Experience is what you get if you don't

• Handle the following conversion specifiers:

• d
• i
• You don’t have to handle the flag characters
• You don’t have to handle field width
• You don’t have to handle precision
• You don’t have to handle the length modifiers

Solution: printf

2. With a face like mine, I do better in print

Write a function that prints strings, followed by a new line.

• Handle the following custom conversion specifiers:

• b: the unsigned int argument is converted to binary

Solution: printf

3. What one has not experienced, one will never understand in print

• Handle the following conversion specifiers:

• u
• o
• x
• X
• You don’t have to handle the flag characters
• You don’t have to handle field width
• You don’t have to handle precision
• You don’t have to handle the length modifiers

Solution: printf

4. Nothing in fine print is ever good news

• Use a local buffer of 1024 chars in order to call write as little as possible.

Solution: printf

5. My weakness is wearing too much leopard print

• Handle the following custom conversion specifier:

• S : prints the string.
• Non printable characters (0 < ASCII value < 32 or >= 127) are printed this way: \x, followed by the ASCII code value in hexadecimal (upper case - always 2 characters)

Solution: printf

6. How is the world ruled and led to war? Diplomats lie to journalists and believe these lies when they see them in print

• Handle the following conversion specifier: p.

• You don’t have to handle the flag characters
• You don’t have to handle field width
• You don’t have to handle precision
• You don’t have to handle the length modifiers

Solution: printf

7. The big print gives and the small print takes away

• Handle the following flag characters for non-custom conversion specifiers:

• +
• space
• #

Solution: printf

8. Sarcasm is lost in print

• Handle the following length modifiers for non-custom conversion specifiers:

• l
• h Conversion specifiers to handle: d, i, u, o, x, X

Solution: printf

9. Print some money and give it to us for the rain forests

• Handle the field width for non-custom conversion specifiers.

Solution: printf

10. The negative is the equivalent of the composer's score, and the print the performance

• Handle the precision for non-custom conversion specifiers.

Solution: printf

11. It's depressing when you're still around and your albums are out of print

• Handle the 0 flag character for non-custom conversion specifiers.

Solution: printf

12. Every time that I wanted to give up, if I saw an interesting textile, print what ever, suddenly I would see a collection

• Handle the - flag character for non-custom conversion specifiers.

Solution: printf

13. Print is the sharpest and the strongest weapon of our party

• Handle the following custom conversion specifier:

• r : prints the reversed string

Solution: printf

14. The flood of print has turned reading into a process of gulping rather than savoring

• Handle the following custom conversion specifier:

• R: prints the rot13'ed string

Solution: printf

15. *

• All the above options work well together.

Solution: printf