在做题的始终是在想将所有的输出结果保存了然后最后一次性输出,结果始终输出不了。现在就直接将输出改为cout输出了。现在虽然本地可以AC了,但是就想问问大佬们,我对多case的处理是否正确。
#include<iostream>
#include<string>
#include<vector>
using namespace std;
bool isMatch(const string &dict, const string &example);
vector<int> getNext(const string &needle, int m, vector<int> next);
int main()
{
while (cin) //此处是否正确?
{
int N;
cin >> N;
vector<string> dict(N, "");
for (int i = 0;i<N;i++)
{
cin >> dict[i];
}
int M;
cin >> M;
vector<string> example(M, "");
for (int i = 0;i<M;i++)
{
cin >> example[i];
}
for (int i = 0;i<M;i++)
{
int count = 0;
for (int j = 0;j<N;j++)
{
if (isMatch(dict[j], example[i]))
{
count++;
}
}
cout << count << endl; //输出
}
}
return 0;
}
//KMP匹配算法
bool isMatch(const string &dict, const string &example)
{
int n = dict.size(), i = 0;
int m = example.size(), j = 0;
if (m>n) return false;
if (n == 0 || m == 0) return true;
vector<int> next(m);
next = getNext(example, m, next);
while (j<m&&i<n)
{
if ((0>j) || dict[i] == example[j])
{
i++;
j++;
}
else
{
j = next[j];
}
}
return j == m ? true : false;
}
vector<int> getNext(const string &needle, int m, vector<int> next)
{
int t = -1;
next[0] = -1;
int j = 0;
while (j<m - 1)
{
if (0>t || needle[j] == needle[t])
{
j++;
t++;
next[j] = (needle[j] != needle[t] ? t : next[t]);
}
else
t = next[t];
}
return next;
}