#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
class Print
{
public:
void operator()(int i)
{
cout << i << endl;
}
};
int main()
{
vector<int> v1;
vector<int> v2;
for(int i = 0; i < 5; i++)
{
v1.push_back(i);
v2.push_back(i + 50);
}
for_each(v1.begin(), v1.end(), Print());
for_each(v2.begin(), v2.end(), Print());
cout << "-------" << endl;
swap(v1, v2);
for_each(v1.begin(), v1.end(), Print());
for_each(v2.begin(), v2.end(), Print());
return 0;
}
$ ./a.out
0
1
2
3
4
50
51
52
53
54
-------
50
51
52
53
54
0
1
2
3
4