This project is a recode of libc's 'printf' function in accordance with the 42 code norm.

🎯 Subject

You can see the subject pdf here.

• Recode libc's 'printf' function.
• It manages the following conversion: cspdiuxX%
• It also manages any combination of the following flags: -0.*
• Example:

  #include "../2.ft_printf/ft_printf.h"
  #include <stdio.h>

  int main(void)
  {
    int num, hex = 20124;
    int *ptr = &num;
    char *str = "EXAMPLE";

    ft_printf("Integer: %d\n", num);
    ft_printf("Hexadecimal: %0*x\n", 10, hex);
    ft_printf("Pointer address: %p\n", ptr);
    ft_printf("String: |%-15s|\n", str);

    return (0);
  }

• Output:

  Integer: 32767
  Hexadecimal: 0000004e9c
  Pointer address: 0x7fff2a63b36c
  String: |EXAMPLE        |

🔧 Usage

The makefile creates a library called "libftprintf.a" that contains ft_printf. You can compile a program with "libftprinf.a".

• Example:

   make && make clean
   gcc main.c libftprintf.a

🪲 Debugging

LLDB is a powerful tool that helped me debug this project, specially the GUI. Here is how you can run it:

• First, modify your makefile so it compiles with '-g3'.

	@gcc -g3 -Wall -Wextra -Werror -I$(INCLUDES) -c $(SRCS)

• At compilation time, compile with '-g3' too.

gcc -g3 main.c libftprintf.a

• Then run the following command consecutively:

lldb a.out
b main
run
gui

In the GUI, use 's', 'tab', 'space' & 'o' to explore your program step by step.

🥊 Testers

• Norminette
• Valgrind
• PFT by Gavin Fielder
• 42TESTERS-PRINTF by Mazoise
• printf_lover_v2 by charMstr
• PRINTF_TESTER by Kwevan Gouacide

📚 Resources

I had many sources of information but the main ones would be:

• https://www.cplusplus.com/reference/cstdio/printf/
• https://pubs.opengroup.org/onlinepubs/9699919799/functions/fprintf.html
• https://en.wikipedia.org/wiki/Stdarg.h
• https://en.wikipedia.org/wiki/Printf_format_string
• This Google Document

✔️ Moulinette

😄 Special Thanks

I want to thank God in the first place for all the special people that helped me through this project:

• @edithturn
• @michaelgiraldo
• @alineayumi
• @piratelicorne
• @geekMe82

Thanks so much. It would have been very different without your help.

SOLI DEO GLORIA