HDU A + B Problem II

题意：两个数相加，计算A+B的和，输出每两组答案之间有个换行。
 1 #include <iostream>
 2 #include <cstdio>
 3 #include <algorithm>
 4 #include <set>
 5 #include <vector>
 6 #include <map>
 7 #define rep(i,a,b) for(int i=(a);i<=(b);++i)
 8 #define per(i,a,b) for(int i=(a);i>=(b);--i)
 9 using namespace std;
10 typedef long long ll;
11 const int N=1e3+7;
12 string a,b;
13 int t;
14 vector<int>add(vector<int> &A, vector<int> &B)
15 {
16     vector<int>C;
17     int t=0;
18     int La=A.size(),Lb=B.size();
19     int maxx=max(La,Lb);
20     rep(i,0,maxx-1){
21         if(i<La) t+=A[i];
22         if(i<Lb) t+=B[i];
23         C.push_back(t%10);
24         t/=10;
25     }
26     if(t) C.push_back(1);
27     return C;
28 }
29 
30 int main()
31 {
32     scanf(" %d",&t);
33     int ok=t,idx=0;
34     while(t--){
35         getchar();
36         cin>>a>>b;
37         vector<int>A,B;
38         idx++;
39         int la=a.size(), lb=b.size();
40         per(i,la-1,0) A.push_back(a[i]-'0');
41         per(i,lb-1,0) B.push_back(b[i]-'0');
42         vector<int> C=add(A,B);
43         std::cout<<"Case "<<idx<<":
";
44         std::cout<<a<<" + "<<b<<" = ";
45         int Lc=C.size();
46         per(i,Lc-1,0) cout<<C[i];
47         std::cout<<'
';
48         if(idx!=ok) std::cout<<'
';
49         C.clear();A.clear();B.clear();
50     }
51     return 0;
52 }