0x11 - printf

Authors

Mojalefa Kodisang & Habiba Zguaid

Description

This project was meant for us to create our own prinf function that behave exactly like a normal printf using C programming concepts:

Functions Pointers
Variadic Functions

What does our printf function do?

Our printf function is limited to few functionality but unable to handle most of the properties a normal printf function normally do. Prototype used for our printf function:

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

Here are the list of properties our function can handle:

1. Handles strings (%s), characters (%c), and a percent character (%%)

#include "main.h"

int main(void)
{
	/* strings */
	_printf("%s", "This is a string!");

	printf("\n");

	/* character */
	char ch = '#';
	_printf("Character: %c", ch);

	printf("\n");

	/* a percent character */
	_printf("%%");

	printf("\n");

	return (0);
}

outcomes

This is a string!
Character: #
%

2. Handles integers (%d and %i)

#include "main.h"

int main(void)
{
    _printf("Positive:[%d]\n", 762534);
	_printf("Negative:[%d]\n", -762534);

	return (0);
}

outcomes

Positive: 762534
Negative: -762534

3. Handles custom conversion specifiers

%b: handles unsigned integers and converting them to

#include "main.h"

int main(void)
{
    _printf("%b\n", 98);
    return (0);
}

outcomes

4. Handles unsigned integers (%u), octal (%o), and hexadecimals (%x - lowercase, %X - uppercase)

#include "main.h"

int main(void)
{
	unsigned int ui;

	ui = (unsigned int)INT_MAX + 1024;
	_printf("Unsigned:[%u]\n", ui);
	_printf("Unsigned octal:[%o]\n", ui);
	_printf("Unsigned hexadecimal:[%x, %X]\n", ui, ui);

	return (0);
}

outcomes

Unsigned:[2147484671]
Unsigned octal:[20000001777]
Unsigned hexadecimal:[800003ff, 800003FF]

WARNING Our function does not handle any precision, width, lengths, nor flags as those functionalities are still in development and will be updated soon

How to use it?

You first download or clone this repository

git clone https://github.com/mojalefakodisang/printf

In the same directory, you can use the _printf prototype mentioned above without moving the files in the directory

copyrights reserved 2023
ALX - African Leadership International
M. Kodisang and B. Zguaid