2.c++

#include <iostream>
#include <vector>

using namespace std;

void bubbleSort(vector<int>& arr) {
    int n = arr.size();
    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] and arr[j+1]
                int temp = arr[j];
                arr[j] = arr[j+1];
                arr[j+1] = temp;
            }
        }
    }
}

int main() {
    vector<int> arr = {64, 34, 25, 12, 22, 11, 90};
    
    cout << "Array before sorting:" << endl;
    for (int num : arr) {
        cout << num << " ";
    }
    cout << endl;

    bubbleSort(arr);

    cout << "Array after sorting:" << endl;
    for (int num : arr) {
        cout << num << " ";
    }
    cout << endl;

    return 0;
}