replace() Function in C++

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
 
void print(vector<int>& v)
{
    for(int i = 0; i < v.size(); i++)
        cout << v[i] << " ";
    cout << endl;
}
 
int main() {
    vector<int> v = {1, 4, 3, 2, 3, 10, 7, 9, 3, 8};
 
    cout << "v : ";
    print(v);
    // replace 3 with 6
    replace(v.begin(), v.end(), 3, 6);
    cout << "After replacing 3 with 6\n";
    cout << "v : ";
    print(v);
}

Output:
$ gcc test.cpp
$ a.out
v : 1 4 3 2 3 10 7 9 3 8 
After replacing 3 with 6
v : 1 4 6 2 6 10 7 9 6 8