HDOJ-1002 用JAVA写大数问题[大数加法]

A + B Problem II

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 116352    Accepted Submission(s): 22064

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

 

 

Author

Ignatius.L

 

 

code：

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

第一次用java写程序，好多东西都不知道。