how to assign all elements of vector in c 2b 2b

1#include <iostream>
2#include <vector>
3using namespace std;
4
5// program to illustrate use of std::vector::assign()
6
7int main()
8{
9	int vec_size, new_val;
10	cin >> vec_size >> new_val;
11	vector<int> vec(vec_size);
12
13	for (int x : vec)
14		cout << x << " ";
15
16	cout << endl;
17
18	// vec.assign(n, val) assigns all n elements of vec new value = val
19	vec.assign(vec_size, new_val);
20	for (int x : vec)
21		cout << x << " ";
22}