java 写 高精度加法 HDU1002

import java.util.*;
import java.math.*;
import java.io.*;
public class  Main
{
    public static void main( String[] args  )
    {
       Scanner cin=new Scanner(new BufferedInputStream (System.in)  );
       BigInteger a,b,c;
       int t,num=0;
       t=cin.nextInt();
       while( t-->=1 )
       {
           num++;
           a=cin.nextBigInteger();
           b=cin.nextBigInteger();
           c=a.add(b);
           System.out.println("Case "+num+":");
           System.out.println(a + " + " + b + " = "+c);
           if(t!=0)System.out.println("");
       }
    }
}