Learn C++: Working with Vectors

                                

    #include <iostream>
    #include <vector>

    int main() {
        std::vector<double> prices = {3.99, 12.99, 2.49};
        std::cout << prices[0] << "\n"; // Prints: 3.99
        std::cout << prices[2] << "\n"; // Prints: 2.49
        return 0;
    }



                              

                                

#include <iostream>
#include <vector>

int main() {
    std::vector<int> scores(3);
    scores[0] = 90;
    scores[1] = 86;
    scores[2] = 98;
    std::cout << scores[0] << "\n"; // Prints: 90
    return 0;
}
    

                              

                                

#include <iostream>
#include <vector>

int main() {
    std::vector<std::string> items;
    items.push_back("Laptop");
    items.push_back("Headphones");
    items.pop_back();
    std::cout << items.size() << "\n"; // Prints: 1
    return 0;
}


                              

                                

#include <iostream>
#include <vector>

int main() {
    std::vector<std::string> names = {"Alice", "Bob", "Charlie"};
    std::cout << names.size() << "\n"; // Prints: 3
    return 0;
}


                              

                                

#include <iostream>
#include <vector>

int main() {
    std::vector<int> numbers = {1, 2, 3, 4, 5};
    std::cout << numbers.size() << "\n"; // Prints: 5
    return 0;
}