Challenge
Understand how functions with a variable number of arguments work, along with format handling, by rewriting printf from scratch, without relying on the libc function.
École 42 ParisStudent, École 42 project
ft_printf, reimplementing printf in C
École 42 project, a C reimplementation of the printf function: parsing the format string, handling conversions (%c %s %p %d %i %u %x %X %%) and variadic arguments (va_args).
École 42 Paris
Impact
- printf function recoded from scratch in C
- Format parsing and handling of variadic arguments (va_args)
- Conversions %c %s %p %d %i %u %x %X %%
Context
Built in 2021 as part of the École 42 Paris curriculum.
What was done
A version of printf that parses the format string, reads the variadic
arguments (va_start / va_arg / va_end) and applies the conversions
by type (%c %s %p %d %i %u %x %X %%), returning the number of characters
written.
Stack
The technologies used on this mission.
- C
- stdarg.h (va_args)
- Format parsing
- Type conversions
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