HDU 1002

这道题是两个大数相加，我们用到BigInteger。

import java.math.BigInteger;import java.util.Scanner;public class Main{    public static void main(String[] args){        int t;        BigInteger a,b;        Scanner scan=new Scanner(System.in);        t=scan.nextInt();        for(int i=1;i<=t;i++){            a=scan.nextBigInteger();            b=scan.nextBigInteger();            if(i<t){                System.out.println("Case "+i+":");                System.out.println(a+" + "+b+" = "+a.add(b));                System.out.println();            }            else{                System.out.println("Case "+i+":");                System.out.println(a+" + "+b+" = "+a.add(b));            }        }    }}