ex00: ft_print_program_name

To get the program's parameters, the main function always receives 2 arguments in the following order:

1. int argc is the number of parameters given to the program. This also includes the name of the program, so it always starts at 1.
2. char **argv, also sometimes typed as char *argv[] is an array of strings, containing each parameter. Remember that the first is always the programs name.

So we just have to print argv[0]. Yes. It's that simple.

ex01: ft_print_params

As we said earlier, we need to get the args from argv and print them. We already wrote ft_putstr before. We basically just skip argv[0] since we don't need it.

ex02: ft_rev_params

Same thing as ft_print_params, only difference is we step i backwards and start at argc - 1, it's minus one because we don't want argv[0]

ex03: ft_sort_params

Same as ft_print_params, but before we start printing argv we must sort it. We first skip the first one by incrementing argv and lowering argc. Then we can adapt ft_sort_int_tab from earlier projects to move pointers instead of int:

void	ft_sort_argv(int argc, char **argv)
{
	int		i;
	int		j;
	char	*tmp;

	i = 0;
	while (i < argc)
	{
		j = 0;
		while (j < argc - i - 1)
		{
			if (ft_strcmp(argv[j], argv[j + 1]) > 0)
			{
				tmp = argv[j + 1];
				argv[j + 1] = argv[j];
				argv[j] = tmp;
			}
			j++;
		}
		i++;
	}
}

We use ft_strcmp that we also wrote in an earlier project to find differences between the 2 strings. Conveniently, ft_strcmp already operates in ASCII order.

Then we can continue just like we did in ft_print_params, since argv is now in the wanted order.

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This page is C06's notes, rendered here from the README on GitHub. Last read on 18 October 2026 at 18:37 UTC.