repeat_alpha

Assignment name  : repeat_alpha
Expected files   : repeat_alpha.c
Allowed functions: write
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Write a program called repeat_alpha that takes a string and display it
repeating each alphabetical character as many times as its alphabetical index,
followed by a newline.

'a' becomes 'a', 'b' becomes 'bb', 'e' becomes 'eeeee', etc...

Case remains unchanged.

If the number of arguments is not 1, just display a newline.

Examples:

$>./repeat_alpha "abc"
abbccc
$>./repeat_alpha "Alex." | cat -e
Alllllllllllleeeeexxxxxxxxxxxxxxxxxxxxxxxx.$
$>./repeat_alpha 'abacadaba 42!' | cat -e
abbacccaddddabba 42!$
$>./repeat_alpha | cat -e
$
$>
$>./repeat_alpha "" | cat -e
$
$>

#include <unistd.h>

void	ft_putchar_n(char c, int i)
{
	while (i > 0)
	{
		write(1, &c, 1);
		--i;
	}
}

void	repeat_alpha(char *str)
{
	while (*str != '\0')
	{
		if (*str >= 'a' && *str <= 'z')
			ft_putchar_n(*str, *str + 1 - 'a');
		else if (*str >= 'A' && *str <= 'Z')
			ft_putchar_n(*str, *str + 1 - 'A');
		else
			write(1, str, 1);
		++str;
	}
}

int		main(int argc, char **argv)
{
	if (argc == 2)
		repeat_alpha(argv[1]);

	write(1, "\n", 1);
	return (0);
}