hdu 1002 A + B Problem II

http://acm.hdu.edu.cn/showproblem.php?pid=1002

大整数加法 ：

 import java.util.*;
import java.math.*;
 public class Main{
     
  public static void main(String args[]){
      
      Scanner cin = new Scanner(System.in) ;
      int T  =  cin.nextInt() ;
      int cas = 0 ;
      while(T != 0){
          T-- ;
         // BigInteger sum  = new BigInteger("0") ;
          String  str1 = cin.next(),str2 = cin.next();
          BigInteger a = new BigInteger(str1) ,b = new BigInteger(str2) ;
          ++cas ;
          System.out.println("Case "+cas+":");
          
         
          System.out.println(a+" + "+b +" = "+a.add(b)) ;
          
          if(T != 0) System.out.println() ;
          
          
          
      }
      
  }
     
 }