整数转字符串 不用itoa

#include "stdafx.h"
#include <iostream>
using namespace std;
void main()
{
 int S;
 char ch[7], temp[7];
 scanf("%d", &S);
 int i = 0, j = 0;
 while(temp[i++] = S%10 + '0', S = S/10, S) ;
 while(i--)
  ch[j++] = temp[i];
 ch[j] = '\0';
 printf("%s\n", ch);
 printf("\n");
}