hdu 1102 A + B Problem II （java大数）

A + B Problem II

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)

Total Submission(s): 230178 Accepted Submission(s): 44173



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
代码一：
import java.util.*;
import java.math.*;

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


A了，但神奇的是代码二PE，还求大神指点迷津
代码二：[code]import java.util.*;
import java.math.*;

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

[/code]