c++ sort vector of objects by property

To sort a vector of objects by a specific property in C++, you can follow these steps:

1. Overload the less than (<) operator in the class of the objects you want to sort.
2. Use the std::sort algorithm from the header, providing the begin and end iterators of the vector, and a lambda function that compares the desired property of the objects.

Here's an example:

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

class Person {
public:
    std::string name;
    int age;

    bool operator<(const Person& other) const {
        return age < other.age; // Sort by age
    }
};

int main() {
    std::vector<Person> people = {{"Alice", 25}, {"Bob", 20}, {"Charlie", 30}};
    std::sort(people.begin(), people.end(), [](const Person& a, const Person& b) {
        return a.age < b.age; // Sort by age
    });

    for (const auto& person : people) {
        std::cout << person.name << " - " << person.age << std::endl;
    }

    return 0;
}

This code will sort the vector of Person objects by the "age" property in ascending order.