0x10. C - printf

#AUTHOR Spencer Cheng - github: spencerhcheng

GOAL

The goal of this project is to:

• -- implement a custom printf function and learn how to deal with writing a larger program
• -- learn how printf works behind the scenes
• -- build a printf function that serves as a tribute to the built in stdio.h printf
• -- gain familiarity with structs, header files, indefinite arguments, etc...

REQUISITES

• -- no more than 5 functions per file
• -- include guarded header file named holberton.h
• -- Authorized functions & macros:
  • : write
  • : malloc
  • : free
  • : va_start
  • : va_end
  • : va_copy
  • : va_arg
  • : own _putchar function

COMPILATION

The code for this project will be compiled with:

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

TASKS

0. I'm not going anywhere. You can print that wherever you want to. I'm here and I'm a Spur for life

This function produces output according to the following format:

• -- returns the number of characters printed

• -- writes output to stdout

• -- format is a character string in the prototype

• -- handles the following conversion specifiers for characters, strings and data types:

  • : c : char
  • : s : string
  • : % : data type specifier

Prototype:

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

1. Education is when you read the fine print. Experience is what you get if you don't

This function handles the following conversion specifiers for integers: * : d : decimal * : i : integer

2. Just because it's in print doesn't mean it's the gospel

Man Page: Documentation specifying general commands and type formats compatible with our printf.

File:

man_3_printf

FUNCTIONS

• -- `int _putchar(va_list args);
• -- int _putchar(va_list args);
• -- int convertArgs(char c, va_list args);
• -- int _printf(const char *format, ...);
• -- int print_string(va_list args);
• -- int reverse_string(va_list args);
• -- void print_us(unsigned int b);
• -- int print_integer(va_list args);
• -- int print_char(char c);
• -- int convert_binary(va_list args);