How do I use vectors in C++ for advanced data manipulation?

How do I use vectors in C++ for advanced data manipulation?

In C++, vectors are dynamic arrays that can resize themselves. You can use them for various data manipulation tasks like sorting, searching, and more.

Can you show me how to sort a vector of integers?

Sure! You can use the std::sort function from the <algorithm> header. Here's an example:

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    std::vector<int> vec = {5, 2, 9, 1, 5, 6};
    std::sort(vec.begin(), vec.end());
    for(int num : vec) {
        std::cout << num << " ";
    }
    return 0;
}

This will sort the vector in ascending order.

What about removing duplicates from a vector?

To remove duplicates, you can use std::unique along with std::erase. Here's how:

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    std::vector<int> vec = {1, 2, 2, 3, 4, 4, 5};
    std::sort(vec.begin(), vec.end());
    auto last = std::unique(vec.begin(), vec.end());
    vec.erase(last, vec.end());
    for(int num : vec) {
        std::cout << num << " ";
    }
    return 0;
}

This will remove duplicates and keep the vector sorted.

Can you explain how to use vectors with custom objects?

Absolutely! You can store custom objects in a vector by defining a class and then creating a vector of that class. Just ensure your class has the necessary constructors and operators defined.