How can I implement sorting algorithms in C++?

How can I implement sorting algorithms in C++?

You can implement various sorting algorithms like Bubble Sort, Quick Sort, and Merge Sort in C++. Which one are you interested in?

Let's start with Bubble Sort. Can you show me an example?

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, and O(n) in the best case when the array is already sorted.

Are there more efficient sorting algorithms I should consider?

Yes, algorithms like Quick Sort and Merge Sort are generally more efficient with average time complexities of O(n log n). Would you like to see an example of one of those?