Printf

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

Simulating the way how the printf (3) function of the programming language C works. _printf

This function is a part of the C standard library <stdio.h> and to use it we must specify the header file <stdio.h>.

_printf takes a string pointed to by format and print it typically in console. It can take also other arguments as format specifiers using the placeholder % and handle them according to their data type (int, float, double float, char, etc)

Parameters

format -> C string that contains the text to be written to stdout.

Followed by the passed arguements, if existed, and translate these parameters according to their respective placeholder %+character. Check the following table:

Specifier	Output	Example
%	A % followed by another % character will write a single % to the stream	%
c	Character	A
s	String of characters	Holberton
i or d	Signed decimal integer	98
b	Unsigned binary	101010
u	Unsigned decimal integer	98
o	Unsigned octal	5523
x	Unsigned hexadecimal integer (lowercase)	36264eb
X	Unsigned hexadecimal integer (uppercase)	36264EB
r	Reversed string	gnirts
R	Rot13 string	cevags

Return Value.

Upon success, the total number of characters written is returned. In case of errors, the error indicator ferror is set and a negative number is returned.

The tasks.

-[x] 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.

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 -- s -- %

-[x] Education is when you read the fine print. Experience is what you get if you don't Handle the following conversion specifiers: -- d --i

Functions to use:

int _putchar(char c); /*writes the character c to stdout */
int _printf(const char *format, ...);/* function that produces output according to a format.*/
int print_char(va_list c);/*writes the character c to stdout */
int print_string(va_list s);/*writes the character c to stdout */
int print_int(va_list i);/*function that prints an integer */
int print_dec(va_list d);/* function that prints an decimal*/

How to use.

Complilation

All of the .c files along with a main.c file are to be compiled with gcc 4.8.4 on Ubuntu 14.04 LTS with the flags -Wall Werror -Westra and -pedantic.

The files will be compiled this way:

gcc -Wall -Werror -Wextra -pedantic *.c

Use.

In the main.c file, use the _printf function like so:

#include "main.h"
/**
 * main - main function of program
 * Return: always 0
 */
int main(void)
{
	int num;
	char *string;

	num = 98;
	string = "Hello, Holberon!";
	_printf("%s is %i.\n", string, num);
	return (0);
}

linux>$  gcc -Wall -Werror -Wextra -pedantic *.c -o printf_program
linux>$  ./printf_program
Hello, Holberton is 98.
linux>$

MahmoudHousam/printf