sort a vector of strings according to their length c++

To sort a vector of strings according to their length in C++, you can use the std::sort function along with a custom comparator. Here are the steps to do that:

1. Include the necessary headers:

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

1. Define a custom comparator function to compare the lengths of two strings:

bool compareLength(const std::string& str1, const std::string& str2) {
    return str1.length() < str2.length();
}

1. Create a vector of strings and populate it with the desired values:

std::vector<std::string> strings = {"apple", "banana", "cherry", "date"};

1. Use the std::sort function to sort the vector using the custom comparator:

std::sort(strings.begin(), strings.end(), compareLength);

1. Print the sorted vector of strings:

for (const auto& str : strings) {
    std::cout << str << " ";
}

The output will be: "date apple cherry banana".

That's it! The vector of strings will be sorted in ascending order based on their lengths.