（hdu1002）A + B Problem II_JAVA_编程开发_程序员俱乐部

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 = 1111111111111111110

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