骄傲的代价 BigInteger

import java.math.BigInteger;import java.util.Scanner;public class Main {public static void main(String[] args) {// TODO Auto-generated method stubScanner cin = new Scanner(System.in);int n = cin.nextInt();for (int i = 1; i <= n; i++) {String str1 = cin.next();String str2 = cin.next();BigInteger big1 = new BigInteger(str1);BigInteger big2 = new BigInteger(str2);BigInteger b = big1.add(big2);System.out.println("Case " + i + ":");System.out.println(big1 +" "+"+" +" "+ big2 +" "+ "=" +" "+ b);if (i < n) {System.out.println();}}}}