Java大数加法 HDU1002

 1 import java.math.*;
 2 import java.util.Scanner;
 3
 4
 5 public class Main{
 6     public static void main(String[] args){
 7         BigInteger a,b;
 8         int n;
 9         BigInteger ans;
10         Scanner cin = new Scanner(System.in);
11         n=cin.nextInt();
12         a=cin.nextBigInteger();
13         b=cin.nextBigInteger();
14         ans=a.add(b);
15         System.out.println("Case 1:");
16         System.out.println(a+" + "+b+" = "+ans);
17         for(int i=2;i<=n;i++)
18         {
19             a=cin.nextBigInteger();
20             b=cin.nextBigInteger();
21             ans=a.add(b);
22             System.out.println();
23             System.out.println("Case "+i+":");
24             System.out.println(a+" + "+b+" = "+ans);
25         }
26     }
27 }