ft_printf is a school 42 project.
git clone https://github.com/mharriso/ft_printf.git
cd ft_printf
make
format string:
%[flags][width][.precision][length]type
Conversions: [cspdiuxXn%]
Flags: [-0.* #]
and minimum field width with all conversions
make test
./test
make surprise
./surprise