Vector test in C++

main.cpp

#include <iostream>
#include <vector>
#include <string>
using namespace std;

void vectorTest();


int main() {
    vectorTest();
}

void vectorTest() {
    vector<string> vec;
    vec.push_back("Simone");
    vec.push_back("Frank");
    vec.push_back("Sarah");
    // iterate with index
    for (int i = 0; i < vec.size(); i++) {
        cout << vec[i] << endl;
    }
    cout << endl;
    // iterate with iterator
    vector<string>::iterator it;
    for (it = vec.begin(); it != vec.end(); it++) {
        cout << *it << endl;
        *it += "XXX";
    }
    cout << endl;
    for (it = vec.begin(); it != vec.end(); it++) {
        cout << *it << endl;
        *it += "XXX";
    }
}