（HDOJ 1002）A + B Problem II

           A + B Problem II

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

 

 AC code:

 1 #include <iostream>
 2 using namespace std;
 3 void add(char a[],char b[])
 4 {
 5   char sum[1010]={' '};
 6   int flg=0;
 7   int temp =0;
 8   int len_a =strlen(a);
 9   int len_b =strlen(b);
10   int i=len_a;
11   int j=len_b;
12   for (;i>0;i--)
13   {
14     if (j>0)
15     {
16       temp =a[i-1]+b[j-1]+flg-96;
17       j--;
18     }
19     else temp = a[i-1]+flg-48;
20     if (temp>=10)
21     {
22      flg=1;
23     }
24     else flg =0;
25     temp =temp%10;
26     sum[i]=temp+48;
27   }
28  if (flg==1)sum[0]=49;
29  i=0;
30  while (i<=len_a)
31  {
32    if (sum[i]!=' ')cout<<sum[i];
33    i++;
34  }
35    cout<<endl;
36  }
37 void main()
38 {
39   int N;
40   while (cin >>N )
41   {
42     for (int i=1;i<=N;i++)
43     {
44       char a[1000];
45       char b[1000];
46       cin >>a;
47       cin >>b;
48       int len_a =strlen(a);
49       int len_b =strlen(b);
50       cout <<"Case "<<i<<":\n"<<a<<" + "<<b<<" = ";
51       if (len_a>=len_b)
52       {
53         add(a,b);
54       }
55       else add(b,a);
56       if (i!=N)cout<<endl;
57      }
58    }

59 }