How to print a vector?

1. Displaying All Vector Elements

To display all the contents of a vector, you can use a ranged for loop to iterate through each element and print it out.

Here’s how you can print the contents of the names vector:

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector<string> names;
    names.push_back("Jeremy");
    names.push_back("Jules");
    names.push_back("Howard");

    string inputName; 
    cin >> inputName;

    names.at(1) = inputName;

    // Printing the vector
    for (const string& name : names) {
        cout << name << endl; // prints each name on a new line
    }

    return 0;
}

In the code above, the for loop uses a range-based syntax to iterate through each element in the names vector and print each one. This approach is simple and effective!

2. Displaying Individual Vector Elements

You can display individual vector elements using either the at() method with index or the [] notation with index.

For example:

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector<string> names;
    names.push_back("Jeremy");
    names.push_back("Jules");
    names.push_back("Howard");

    cout << names.at(0) << endl;
    cout << names[1] << endl;
    cout << names.at(2) << endl;
 
    return 0;
}

Important! Since the at() method is safer, you should use this instead of [].