This is a re-implementation of the C standard library function printf. The ft_printf function has the same functionality as printf, but is implemented using only the functions from the libft library.
To use ft_printf, call the ft_printf function with the desired format string and arguments. The format string follows the same format as in printf, using the % character to indicate format specifiers.
The ft_printf function takes a format string and a variable number of arguments, using the ... syntax to indicate that the arguments are variable. The format string specifies the output format, while the arguments provide the values to be printed.
Inside the ft_printf function, the va_start, va_arg, and va_end macros from the <stdarg.h> header are used to access the variable arguments. These macros allow the function to iterate through the variable arguments, retrieving each argument based on its type and the format specifier in the format string.
The use of variadic functions in ft_printf allows it to handle a wide range of input types and formats, making it a powerful and flexible tool for printing formatted output in C.
ft_printf supports the following format specifiers:
%c: print a character%s: print a string%p: print a pointer%d: print a signed integer in base 10%i: print a signed integer in base 10%u: print an unsigned integer in base 10%x: print an unsigned integer in base 16 (lowercase)%X: print an unsigned integer in base 16 (uppercase)%f: print a floating-point number in decimal notation
ft_printf returns the number of characters printed (excluding the null terminator), or a negative value if an error occurred.