ntostring
#include<iostream>
#include<string>
#include<stdlib.h>
using namespace std;
void nts(int num)
{
const int SIZE=256;
char buffer[SIZE];
int offset=SIZE-1;
buffer[offset]='\0';
while(num>=10)
{
int d=num % 10;
num=num / 10;
buffer[--offset]=(char)(d+0x30);
}
buffer[--offset]=(char)(num+0x30);
cout<<(buffer+offset)<<endl;
}
int main()
{
nts(18123421);
}