任意进制转换《二》

#include <stdio.h>
#include <conio.h>
#include<iostream>
#include<cstring>
using namespace std;



long toTen(char a[],int bit)
{
    long i,b=1,sum=0;
    int length=strlen(a);
    for (i=length-1;i>=0;i--)
    {
        if (a[i]>='A')
        {
            sum+=(a[i]-'A'+10)*b;
            b*=bit;
        }
        else
        {
            sum+=(a[i]-'0')*b;
            b*=bit;
        }
    }
    return sum;
}
void to_base_n(unsigned long n, unsigned int base)  //*recursive function
{
    int i;
    i = n % base;

    if(n >= base)
    {
        to_base_n(n/base, base);
    }
if(i>=10) putchar('A' + i-10);
    else
    putchar('0' + i);
    return ;
}



int main(void)
{
char a[100];int base,last;
    while(1)
    {cin>>a>>base>>last;
 to_base_n( toTen(a,base),last);





    }
    return 0;
}