_printf function

This project consists of a recodification of the printf function in the C language. The printf function is widely used to display formatted text in the console. As an exercise to Holberton School, the aim of this project is to understand the inner workings of the standard printf function in the C library.

Prototype: int _printf(const char *, ...);

Mandatory Tasks

• Write function that produces output with conversion specifiers c, s, and %.
• Handle conversion specifiers d, i.
• Create a man page for your function.

Requirements

• Allowed editors: vim or emacs.
• All the files will be compiled on Ubuntu 20.04 LTS using gcc.
• The code should use the betty style.
• Global variables are not allowed.
• No more than 5 functions per file.
• The prototypes of all the functions should be included in the header file called main.h.
• The header files should be include guarded.
• The code will be compiled this way: gcc -Wall -Werror -Wextra -pedantic -std=gnu89 -Wno-format *.c

Flowcharts

Specifiers

Specifiers are used to define the display format of variables in the _printf function. Here is a list of the specifiers available in this code:

Specifiers	Description
%c	Prints a single character
%s	Print a null-terminated string
%%	Print a literal '%' character
%d	Print a decimal number
%i	Print an integer

Exemples

Input

#include "main.h"

/**
 * main - Entry point
 *
 * Return: Always 0
 */
int main(void)
{
    int len;
    int len2;

    len = _printf("Let's try to printf a simple sentence.\n");
    len2 = _printf("Let's try to printf an other one.\n");
    _printf("Length:[%d, %i]\n", len2, len2);
    _printf("Negative:[%d]\n", -762534);
    _printf("Character:[%c]\n", 'H');
    _printf("String:[%s]\n", "I am a string !");
    len = _printf("Percent:[%%]\n");
    len2 = _printf("Percent:[%%]\n");
    _printf("Len:[%d]\n", len2);


    return (0);
}

Output

Let's try to printf a simple sentence.
Let's try to printf an other one.
Length:[34, 34]
Negative:[-762534]
Character:[H]
String:[I am a string !]
Percent:[%]
Percent:[%]
Len:[12]

File Descriptions

FILE	DESCRIPTION
_printf.c	Contain the main _printf function
_putchar.c	A function that print a single chararacter in the standard output
handlers.c	Contain the functions whitch corresponds to the specifier
main.h	Contain libraries, structure and function prototypes
parser.c	the function that processes a specifier if it finds one
specifier_handler.c	Contain the function which get the function whitch corresponds to the specifier
man_3_printf	Man page of the _printf function
resources	Contain the Flowcharts and the main function we use to test the program

Authors

• @Elie Fétis
• @Adonis Riahi