sort strings by length and by alphabet

To sort strings by length and alphabet in C++, you can follow these steps:

1. Include the necessary header files: cpp #include <iostream> #include <algorithm> #include <vector> #include <string>

2. Define a custom comparison function to sort strings by length: cpp bool compareByLength(const std::string &a, const std::string &b) { return a.length() < b.length(); }

3. Define a custom comparison function to sort strings alphabetically: cpp bool compareAlphabetically(const std::string &a, const std::string &b) { return a < b; }

4. Create a vector of strings: cpp std::vector<std::string> strings = {"apple", "banana", "orange", "grape", "pear"};

5. Sort the strings by length using the custom comparison function: cpp std::sort(strings.begin(), strings.end(), compareByLength);

6. Display the sorted strings by length: cpp std::cout << "Sorted by length:" << std::endl; for (const auto &str : strings) { std::cout << str << std::endl; }

7. Sort the strings alphabetically: cpp std::sort(strings.begin(), strings.end(), compareAlphabetically);

8. Display the strings sorted alphabetically: cpp std::cout << "Sorted alphabetically:" << std::endl; for (const auto &str : strings) { std::cout << str << std::endl; }

9. Output the sorted strings by length and alphabet: Sorted by length: pear grape apple banana orange Sorted alphabetically: apple banana grape orange pear