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ft_putnbr.c
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ft_putnbr.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_putnbr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dbrandao <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/07/01 22:56:00 by dbrandao #+# #+# */
/* Updated: 2022/07/04 05:02:46 by dbrandao ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static int ft_power(int n, int pwr)
{
int result;
result = 1;
while (pwr--)
result *= n;
return (result);
}
static int decimal_count(int n)
{
int i;
i = 0;
if (!n)
return (1);
else
{
while (n)
{
n = n / 10;
i++;
}
}
return (i);
}
static void negative_case(int *n)
{
if (*n < 0)
{
if (*n == -2147483648)
{
write(1, "-2", 2);
*n += 2000000000;
*n *= -1;
}
else
{
write(1, "-", 1);
*n *= -1;
}
}
}
/*
logic in loop:
pow = 10 ^ (dp - 1)
n = number / pow
write(n);
number -= n * pow;
dp--;
*/
void ft_putnbr(int n)
{
int decimal_places;
int pow;
int unit;
negative_case(&n);
decimal_places = decimal_count(n);
while (decimal_places)
{
pow = ft_power(10, decimal_places - 1);
unit = n / pow;
ft_putchar(unit + 48);
n -= unit * pow;
decimal_places--;
}
}