chimeszn / printf

This is a repo replicating the C standard library printf function, done by Oluchime Promise and Barbara Beatrice Stanley for ALX Holberton School

0x11. C - printf

Description

This team project was done by Oluchime Promise and Beatrice Barbara Stanley, both students of ALX Software Engineering School. This is a part of the curriculum of the ALX-Holberton School and is a required project. The project entails the creation of a function called printf and this function replicates and works exactly like the C standard library printf() function

Prototype

int _printf(const char *format, ...);

Usage, Implementation and Examples

• All files created were created and compiled on Ubuntu 20.04

• Code was compiled with gcc -Wall -Werror -Wextra -pedantic -std=gnu89 *.c ..*

• The "main.h" file containing the functions using the _printf() funtion are included

• The syntax for calling is _printf("format string", arguments...); _where format string can contain conversion specfiers and flags, alongside regular characters.

Examples ###* _printf("Hello World\n"); prints "Hello World", followed by a new line.

• _printf("This number is %d", 40); prints "This number is 40."

• _printf("My name is %s\n", John); prints "My name is John, followed by a new line."

Tasks

These are the completed tasks for this project and the problems the function aims to solve

[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.

1. Returns: the number of characters printed (excluding the null byte used to end output to strings)
2. c : converts input into a character
3. s : converts input into a string

1. Education is when you read the fine print. Experience is what you get if you don't ##* Handle the following conversion specifiers

1. d : converts input into a base 10 integer
2. i : converts input into an integer

2. Just because it's in print doesn't mean it's the gospel

• Create a man page for the function

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

• Handle specific custom conversion specifiers

1. b: converts unsigned int to binary

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

• Handle the following conversion specifiers:

1. u: converts input to unsigned integer
2. o: converts the input into an octal number
3. x: converts input into hexadecimal number
4. X: converts the input into a hexadecimal number with capital letters

5. Nothing in fine print is ever good news

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

6. How is the world ruled and led to war? Diplomats lie to journalists and believe these lies when they see them in print ##* Handles the following conversion specifier:

1. p: int input is converted to a pointer address

7. My weakness is wearing too much leopard print

• 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)

8. The big print gives and the small print takes away ##* Handle the following flag characters for non-custom conversion specifiers:

1. + : adds a + in front of signed positive numbers and a - in front of signed negative numbers2. space : same as +, but adds a space (is overwritten by +)
2. # : adds a 0 in front of octal conversions that don't begin with one, and a 0x or 0x for x or X conversions

9. Sarcasm is lost in print

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

1. l : converts d, i, u, o, x, X conversions in short signed or unsigned ints2. h : converts d, i, u, o, x, X conversions in long signed or unsigned ints

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

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

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

• Handle the precision for non-custom conversion specifiers.

12. 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.

13. 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.

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

• Handle the following custom conversion specifier:

1. r: prints the reversed string

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

• Handle the following custom conversion specifier:

1. 'R': prints the rot13'ed string

16. *

• All the above options work together

AUTHORS

• Oluchime Promise

• Barbara Stanley