0x11. C - printf

Description

This team project is part of the first year curriculum of Holberton School. _printf replicates the C standard library printf() function.

What you should learn from this project:

• How to use git in a team setting
• Applying variadic functions to a big project
• The complexities of printf
• Managing a lot of files and finding a good workflow

Prototype

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

Usage

• Prints a string to the standard output, according to a given format
• All files were created and compiled on Ubuntu 14.04.4 LTS using GCC 4.8.4 with the command gcc -Wall -Werror -Wextra -pedantic *.c
• All files were linted for syntax and style with Betty
• Returns the number of characters in the output string on success, -1 otherwise
• Call it this way: _printf("format string", arguments...) where format string can contain conversion specifiers and flags, along with regular characters

Examples

• _printf("Hello, Holberton\n") prints "Hello, Holberton", followed by a new line
• _printf("%s", "Hello") prints "Hello"
• _printf("This is a number: %d", 98) prints "This is a number: 98"

Tasks

These are all the tasks of this project, the ones that are completed link to the corresponding files.

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 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 : converts input into a character
    • 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:
  • d : converts input into a base 10 integer
  • 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 your function

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

• Handle the following conversion specifiers:
  • b : the unsigned int argument is converted to binary

alex@ubuntu:~/c/printf$ cat main.c
#include "holberton.h"

/**
 * main - Entry point
 *
 * Return: Always 0
 */
int main(void)
{
    _printf("%b\n", 98);
    return (0);
}
alex@ubuntu:~/c/printf$ gcc -Wall -Wextra -Werror -pedantic main.c
alex@ubuntu:~/c/printf$ ./a.out
1100010

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

• Handle the following custom conversion specifier:
  • 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:
  • R : prints the rot13'ed string

Authors

• Kyle Campbell - (https://github.com/waffle52)
• Bob Deprizio - (https://github.com/BD20171998)