Custom Printf Fuction

This project implements a simplified version of the standard C library function printf using C programming language. The function _printf supports formatting options for characters (%c), strings (%s), and the percent symbol (%%) and integers (%d and %i). If an unsupported format specifier is encountered, the specifier itself is printed.

Features:

Specifiers	Description
'%c'	Print a single character
'%s'	Print a string of characters
'%%'	Print a percentage symbol
%i & %d	print a nomber int

• Unsupported Format Specifiers:

  • Prints the specifier as is.

• Additional Functionality:

  • Handles NULL strings by printing "(null)".

Files:

• main.h: Header file containing function declarations and necessary includes.
• main.c Source file containing the implementation of _printf and auxiliary functions.
• README.md This file, providing an overview of the project and usage instructions.

usage:

• Compilation:

gcc -Wall -Werror -Wextra -pedantic -std=gnu89 -Wno-format *.c

• Example Usage:

#include "main.h"
#include <stdio.h>

int main(void)
{
    int len;
    char ch = 'A';
    char *str = "Hello, world!";

    len = _printf("Let's print a character: %c\n", ch);
    _printf("Let's print a string: %s\n", str);
    _printf("Let's print the percent symbol: %%\n");
    _printf("Number of characters printed: %d\n", len);
    return (0);
}

• Expected Output:

Let's print a character: A
Let's print a string: Hello, world!
Let's print the percent symbol: %
Number of characters printed: 47

Function Details

• printf(const char *format, ...)

  • Main function that mimics printf. Takes a format string (format) and variable arguments (...). Iterates through the format string, printing characters directly unless it encounters a %, in which case it handles the specified format.

• print_string(char *str, int *contador)

  • _uxiliary function used by printf to print strings. If str is NULL, it prints "(null)".

• print_default(const char *format, int *i, int *counter)_

  • Handles the default case for unsupported format specifiers.

• void print_numero(int n, int *contador)

  • This function prints an integer recursively. Handles negative numbers and updates the printed character counter

• strlen(const char *s)

  • Calculates the length of the string 's'.

• putchar(char c)

  • Writes the character c to the standard output.

😲 Antes y Después

Antes de usar Mi codigo_

_Después de usar Mi codigo:

## 🤓 Datos Curiosos

• ¿Sabías que...? Este proyecto usa más café que código. ☕

https://github.com/maytepioli