Sorting-Algorithms/sorting-methods/bubble_sort.h at master · leduythuccs/Sorting-Algorithms · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
#ifndef BUBBLE_SORT_HEADER
#define BUBBLE_SORT_HEADER

#include "../helper/utils.h"

/**
 * Bubble Sort
 * Average complexity: O(n^2)
 * Best Case: O(n^2)
 * Worst Case: O(n^2)
 * Space: O(1)
 */
void bubble_sort(int a[], int n) {
    for (int j = n; j > 1; --j)
        for (int i = 1; i < j; ++i)
            if (a[i - 1] > a[i])
                swap(a[i - 1], a[i]);
}

/**
 * Bubble Sort Optimize
 * Average complexity: O(n^2)
 * Best Case: O(n)
 * Worst Case: O(n^2)
 * Space: O(1)
 * Stable
 */
void bubble_sort_optimize1(int a[], int n) {
    for (int j = n; j > 1; --j) {
        bool stop = true;
        for (int i = 1; i < j; ++i)
            if (a[i - 1] > a[i])
                swap(a[i - 1], a[i]),
                stop = false;
        if (stop) break;
    }
}

#endif