1 #include <iostream>
2 #include <string>
3 using namespace std;
4 template<class T,class Pred>
5 T* Filter(T* p,T* q,T* s,Pred op){
6 while(p < q){
7 if(op(*p)){
8 *s = *p;
9 ++ s;
10 }
11 ++ p;
12 }
13 return s;
14 }
15 bool LargerThan2(int n)
16 {
17 return n > 2;
18 }
19 bool LongerThan3(string s)
20 {
21 return s.length() > 3;
22 }
23
24 string as1[5] = {"Tom","Mike","Jack","Ted","Lucy"};
25 string as2[5];
26 int a1[5] = { 1,2,3,4,5};
27 int a2[5];
28 int main() {
29 string * p = Filter(as1,as1+5,as2,LongerThan3);
30 for(int i = 0;i < p - as2; ++i)
31 cout << as2[i];
32 cout << endl;
33 int * p2 = Filter(a1,a1+5,a2,LargerThan2);
34 for(int i = 0;i < p2-a2; ++i)
35 cout << a2[i] << ",";
36 return 0;
37 }
