hdu1002——A + B Problem II（大数加）

Problem Description
I have a very simple problem for you. Given two integers A and B,your job is to calculate the Sum of A + B.

Input
The first line of the input contains an integer T(1<=T<=20) which means the number of test cases. Then T lines follow,each line consists of two positive integers,A and B. Notice that the integers are very large,that means you should not process them by using 32-bit integer. You may assume the length of each integer will not exceed 1000.

Output
For each test case,you should output two lines. The first line is “Case #:”,# means the number of the test case. The second line is the an equation “A + B = Sum”,Sum means the result of A + B. Note there are some spaces int the equation. Output a blank line between two test cases.

Sample Input
2
1 2
112233445566778899 998877665544332211

Sample Output
Case 1:
1 + 2 = 3

Case 2:
112233445566778899 + 998877665544332211 = 2222222222222221110

要是我有个靠谱的C++大数模板该多好。。。

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