How can I implement sorting algorithms in C++?

How can I implement sorting algorithms in C++?

You can implement sorting algorithms like bubble sort, quicksort, and mergesort in C++. Which one would you like to start with?

Let's start with bubble sort. Can you show me the code?

Sure! Here's a simple implementation of bubble sort in C++:

#include <iostream>
using namespace std;

void bubbleSort(int arr[], int n) {
    for (int i = 0; i < n-1; i++)
        for (int j = 0; j < n-i-1; j++)
            if (arr[j] > arr[j+1])
                swap(arr[j], arr[j+1]);
}

int main() {
    int arr[] = {64, 34, 25, 12, 22, 11, 90};
    int n = sizeof(arr)/sizeof(arr[0]);
    bubbleSort(arr, n);
    cout << "Sorted array: ";
    for (int i=0; i < n; i++)
        cout << arr[i] << " ";
    return 0;
}

This will sort the array in ascending order.

What is the time complexity of bubble sort?

The time complexity of bubble sort is O(n^2) in the worst and average cases, where n is the number of elements in the array.

Are there more efficient sorting algorithms?

Yes, algorithms like quicksort and mergesort have better average time complexities of O(n log n). Would you like to learn about one of them?