进制转换模板

package test3;
import java.*;
import java.util.*;
public class Main112 {
    public static int value(char x){
        if(x>='0'&&x<='9')
            return x-'0';
        if(x>='a'&&x<='f')
            return x-'a'+10;
        if(x>='A' && x<='F') return x-'A'+10;
        return 0;

    }
     public static String jinzhi(String x,int q ,int m){
         int n=0;
         for(int i=0;i<x.length();i++){
             n=q*n+value(x.charAt(i));
         }
         String t ="";
         for(;;){
             if(n==0)break;
             t=(n%m)+t;
             n/=m;
         }
         return t;
     }
    public static void main(String[] args) {
         Scanner sc = new Scanner(System.in);
         String s = sc.nextLine();
         int q = sc.nextInt();
         int m = sc.nextInt();
         System.out.println(jinzhi(s,q,m));
    }

}