Assignment name  : ft_printf
Expected files   : ft_printf.c
Allowed functions: malloc, free, write, va_start, va_arg, va_copy, va_end
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Write a function named `ft_printf` that will mimic the real printf with the following constraints:

- It will manage only the following conversions: s,d and x
- It will manage the minimum field width. (we will never test with a field with of 0)
- It will manage only the precison flag `.`.

Your function must be declared as follows:

int ft_printf(const char *, ... );

Before you start we advise you to read the `man 3 printf` and the `man va_arg`.
To test your program compare your results with the true printf.

Your function must not leak.


Exemples of the function output:

call: ft_printf("%10.2s\n", "toto");
out:        to$

call: ft_printf("Magic %s is %5d", "number", 42);
out:Magic number is    42%

call: ft_printf("Hexadecimal for %d is %x\n", 42, 42);
out:Hexadecimal for 42 is 2a$

Warning: Your function must not have any leaks, this will be checked during moulinette