ft_printf()

The ft_printf() function is a C function that is used to print formatted output to the console or to a file. This project aims to recode the printf() function from the C standard library while learning to use variable numbers of arguments, also known as variadic functions.

Table of Contents

• Function Prototype
• Description
• Usage
• Supported Conversions
• Return Value
• Examples
• Author

Function Prototype

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

Description

The ft_printf() function takes a format string and any number of additional arguments as input. The format string contains conversion specifiers, which begin with a '%' character and are followed by a character that specifies the type of output to be printed.

The ft_printf() function then processes the format string and any additional arguments, and prints the formatted output to the console or to a file.

Usage

The ft_printf() function can be used in a similar way to the printf() function from the C standard library. To use the ft_printf() function, include the header file "ft_printf.h" in your C program:

#include "ft_printf.h"

Then call the ft_printf() function with the desired format string and any additional arguments:

ft_printf("Hello, %s!", "world");

Supported Conversions

The ft_printf() function supports the following conversion specifiers:

Specifier	Output
%c	Character
%s	String of characters
%p	Pointer address
%d or %i	Signed decimal integer
%u	Unsigned decimal integer
%x	Unsigned hexadecimal integer (lowercase)
%X	Unsigned hexadecimal integer (uppercase)
%%	Percent sign

Return Value

The ft_printf() function returns the number of characters printed to the console or to a file. If an error occurs, ft_printf() returns a negative value.

Examples

#include "ft_printf.h"

int main()
{
    ft_printf("Hello, %s!\n", "world");
    ft_printf("%d + %d = %d\n", 2, 3, 5);
    ft_printf("Hex: %x, Hex (uppercase): %X\n", 255, 255);
    return 0;
}

Output:

Hello, world!
2 + 3 = 5
Hex: ff, Hex (uppercase): FF

Authors

This project was implemented by radeau as a part of 42 Abu Dhabi Project.