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ft_itoa.c
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ft_itoa.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_itoa.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dmlasko <dmlasko@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/09 17:39:14 by dmlasko #+# #+# */
/* Updated: 2024/07/12 18:34:10 by dmlasko ### ########.fr */
/* */
/* ************************************************************************** */
//Function name ft_itoa
//Prototype char *ft_itoa(int n);
//Turn in files -
//Parameters n: the integer to convert.
//Return value The string representing the integer.
// NULL if the allocation fails.
//External functs. malloc
//Description Allocates (with malloc(3)) and returns a string
// representing the integer received as an argument.
// Negative numbers must be handled.
#include "libft.h"
// str to int
int ft_int_len(int n)
{
int len;
len = 0;
if (n == 0)
len = 1;
while (n)
{
n = n / 10;
len++;
}
return (len);
}
char *ft_itoa(int n)
{
char *str;
int is_negative;
int str_len;
is_negative = 0;
if (n < 0)
is_negative = 1;
else
n = -n;
str_len = ft_int_len(n) + is_negative;
str = malloc(sizeof(char) * (str_len + 1));
if (str == NULL)
return (NULL);
str[str_len] = '\0';
while (str_len > 0)
{
str[str_len - 1] = '0' - n % 10;
n = n / 10;
str_len--;
}
if (is_negative)
str[str_len] = '-';
return ((char *)str);
}
//#include <stdio.h>
//int main(void)
//{
// int n = -10;
// //printf("%d\n", ft_int_len(n));
// printf("%s\n", ft_itoa(n));
//}