forked from philona/cppcodes
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathquicksort.cpp
More file actions
54 lines (42 loc) · 794 Bytes
/
quicksort.cpp
File metadata and controls
54 lines (42 loc) · 794 Bytes
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
#include<iostream>
using namespace std;
void swap(int arr[], int i, int j)
{
int temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
int partition(int arr[], int l, int r)
{
int piv = arr[r];
int i = l - 1;
for (int j = l; j < r; j++)
{
if(arr[j] < piv)
{
i++;
swap(arr,i,j);
}
}
swap(arr,i+1,r);
return i+1;
}
void QuickSort(int arr[], int l, int r)
{
if(l<r)
{
int piv = partition(arr, l, r);
QuickSort(arr, l, piv-1);
QuickSort(arr,piv+1,r);
}
}
int main()
{
int arr[5] = {5,4,3,2,1};
QuickSort(arr,0,4);
for (int i = 0; i < 5; i++)
{
cout<<arr[i]<<" ";
}
cout<<endl;
}