1 #include<iostream>
 2 #include<string>
 3 #include <iostream>
 4 #include <string>
 5 #include <vector>
 6 #include <algorithm>
 7 using namespace std;
 8 
 9 int main()
10 {
11     vector<int> vec{0,1,2,3,4};
12     fill_n(vec.begin(), vec.size(), 5);
13     for (auto c : vec)
14         cout << c << endl;
15     system("pause");
16     return 0;
17 }