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#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
/*
** itoa(n,s) - Convert n to characters in s
*/
char* __itoa(int n,char* s)
{
int sign;
char *ptr;
ptr = s;
if(n == (int)0x80000000)
return strcpy(s
, "-2147483648"); // overflowed -n
if ((sign = n) < 0) n = -n;
do {
*ptr++ = n % 10 + '0';
} while ((n = n / 10) > 0);
if (sign < 0) *ptr++ = '-';
*ptr = '\0';
return strrev(s);
}