ft_printf

This project is a partial reimplementation of the C standard library function printf. It's a core project in the 42 school curriculum, designed to deepen understanding of C programming, especially variadic functions.

About The Project

The ft_printf function mimics the behavior of the original printf. It takes a format string and a variable number of arguments, then writes the formatted output to the standard output.

This implementation is based on the included libft library, which contains a set of custom, re-coded standard C library functions.

Supported Specifiers

The following conversion specifiers are supported:

• %c: Prints a single character.
• %s: Prints a string of characters.
• %p: Prints a pointer address in hexadecimal format.
• %d: Prints a decimal (base 10) number.
• %i: Prints an integer in base 10.
• %u: Prints an unsigned decimal (base 10) number.
• %x: Prints a number in hexadecimal (base 16) lowercase format.
• %X: Prints a number in hexadecimal (base 16) uppercase format.
• %%: Prints a literal percent sign.

How to Use

1. Compilation

To compile the project and create the static library (libftprintf.a), follow these steps:

1. Clone the repository:

   git clone https://github.com/your-username/ft_printf.git

2. Navigate to the project directory:

   cd ft_printf

3. Run the Makefile:

   make

   This will compile all the necessary source files and create the libftprintf.a library file.

2. Usage in your C code

To use the ft_printf function in your own project:

1. Include the header file ft_printf.h in your C source files.
2. When compiling your project, link the libftprintf.a library.

Example main.c:

#include "ft_printf.h"

int main(void)
{
    char    *str = "world";
    int     num = 42;
    void    *ptr = #

    ft_printf("Hello, %s!\n", str);
    ft_printf("The magic number is %d (or %i).\n", num, num);
    ft_printf("Its unsigned value is %u.\n", num);
    ft_printf("In hexadecimal, it's %x (lowercase) or %X (uppercase).\n", num, num);
    ft_printf("The address of the number is: %p\n", ptr);
    ft_printf("This is a test of the percent sign: %%%%\n");

    return (0);
}

Compilation command:

cc main.c -L. -lftprintf -o my_program

This command links your main.c with the libftprintf.a library (the -L. tells the compiler to look in the current directory for libraries, and -lftprintf links the library).

Makefile Rules

The provided Makefile includes the following rules:

• make all or make: Compiles the ft_printf library and libft.
• make clean: Removes all object files (.o).
• make fclean: Removes all object files and the final libftprintf.a library file.
• make re: Runs fclean and then all to recompile the library from scratch.