60 lines
801 B
C++
60 lines
801 B
C++
|
|
# include <sstream>
|
|
#include <string.h>
|
|
|
|
static int eval_is_negative(int *n)
|
|
{
|
|
if (*n < 0)
|
|
{
|
|
*n = *n * -1;
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int eval_digit_nbr(int n)
|
|
{
|
|
int digit_nbr;
|
|
|
|
if (n == 0)
|
|
return (1);
|
|
digit_nbr = 0;
|
|
while (n != 0)
|
|
{
|
|
digit_nbr++;
|
|
n = n / 10;
|
|
}
|
|
return (digit_nbr);
|
|
}
|
|
|
|
char *ft_itoa(int n)
|
|
{
|
|
|
|
// std::stringstream strs;
|
|
// std::string s;
|
|
//
|
|
// strs << n;
|
|
// s = strs.str();
|
|
// return ((char*)(s.c_str()));
|
|
|
|
int i;
|
|
char *str;
|
|
int is_negative;
|
|
|
|
if (n == -2147483648)
|
|
return (strdup("-2147483648"));
|
|
is_negative = eval_is_negative(&n);
|
|
i = eval_digit_nbr(n) + is_negative;
|
|
str = new char[i+1];
|
|
if (is_negative)
|
|
str[0] = '-';
|
|
str[i] = '\0';
|
|
while (i > 0 + is_negative)
|
|
{
|
|
i--;
|
|
str[i] = (n % 10) + '0';
|
|
n = n / 10;
|
|
}
|
|
return (str);
|
|
}
|