_PRINTF

Do you know the printf function?

No?

Get to know us!

printf is a function that allows us to show or print a formatted string, this function is typical of the programming language "C" and has a prototype similar to the following, taking into account that the variable "x" has a value of 30:

    int x = 25;
    printf ("my age is:%d \n years old", x);

will print the following line.

vagrant @ vagrant-ubuntu-trusty-64:~$
my age is 25

And what can I print with printf

Printf accepts different types of characters to print, but like all functions it has a standardized encoding that accepts with reserved words or characters the way I can print a different type of character, such as the following:

Formatter	Departure
%d or %i	signed 10 base integer (int);
%u	unsigned base 10 integer (int)
%o	unsigned base 8 integer (int)
%x	base 16 integer, lowercase letters (int)
%X	base 16 integer, uppercase letters (int)
%c	character (char)
%s	character string (string)
%b	base binary 0,1

amazing printf! no?

---

Now let's make our own printf

To make our own printf we must start with something very important, our function name which we will call _ printf

_ printf

What we will also do is fascinating because we will create our own printf function, in which we will give you a set of steps so that you can print according to a character or formatter the type of data that we need to print.

1.

We create a header file that we will call

holberton.h

In holberton.h we will keep all the libraries that we need to include for the operation of our function _ printf, along with the prototypes that will make the connection with each file and its function.

2.

we start with our main file! What a thrill!! which we will call

_printf

This file will have all the structure or logic to tell our function _printf when it should work and under what parameters, looking for the encoding that we gave our file with _getmatch_print.c, managing to connect with the other functions necessary for each need:

• _ putchar.c
• _printChar.c
• _printString.c
• _printInt.c
• _printDeci.c
• _printUnsInt.c
• _printBinary.c
• _printOcatl.c
• _printHexaLower.c
• _printHexaUpper.c

3.

We add a manual explaining how our function works, you can call it as follows:

vagrant @ vagrant-ubuntu-trusty-64:~$ ./man_3_printf

4.

Now we compile! with the following:

vagrant @ vagrant-ubuntu-trusty-64:~$ gcc -Wall -Wextra -Werror -pedantic -Wno-format * .c -o test

5.

Now we will test our function! Now encode the following:

#include "holberton.h"
/ **
 * main - Entry point
 * Return: Always 0
 * /
int main (void)
{
    char name1[] = "Cristian Bedoya";
    char name2[] = "Jocelyn Vega";
    
    _printf ("members: [%s, %s] \n", name1, name2);
    
    return (0);
}

** Remember that it is a project open to your comments and you can contribute **

Thank you!