A + B Problem II HDU

非常简单的大数加法，因为不会Java只能手写大数加法了;博客存一下以后回来看看

#include<bits/stdc++.h>
using namespace std;
const int maxn = 1000+5;
char A[maxn],B[maxn],ans[maxn];
void flip(char str[])
{
    int startstr=0,endstr=strlen(str)-1;
    for(;startstr<endstr;startstr++,endstr--)
        swap(str[startstr],str[endstr]);
}
void slove()
{
    flip(A),flip(B);
    int last = 0 ;
    int len = max(strlen(A),strlen(B));
    for(int i=0;i<len;i++)
    {
        int tmp = last;
        if(A[i]) tmp += A[i] -'0';
        if(B[i]) tmp += B[i] -'0';
        last = tmp / 10;
        ans[i] = tmp%10 + '0';
    }
    if(last) ans[len] = last + '0' ;
    flip(ans);flip(A);flip(B);
}
int main()
{
    int n;cin >> n;
    for(int i=1;i<=n;i++)
    {
        memset(A,0,sizeof(A));
        memset(B,0,sizeof(B));
        memset(ans,0,sizeof(ans));
        cin >> A >> B;
        if(i!=1) cout << "
";
        printf("Case %d:
",i);
        slove();
        printf("%s + %s = %s
",A,B,ans);
    }
    return 0;
}