-
Notifications
You must be signed in to change notification settings - Fork 1
/
QuickSort.c
71 lines (56 loc) · 1.58 KB
/
QuickSort.c
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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
#include <stdio.h>
int main() {
printf("Kindly enter the number of elements: ");
int n;
int i=0;
scanf("%d",&n);
int arr[n];
printf("Kindly enter the array elements: ");
for(i=0;i<n;i++){
scanf("%d",&arr[i]);
}
quickSort(arr,0, n-1);
printf("\nSorted array is \n");
for (i = 0; i < n; i++)
printf("%d ", arr[i]);
printf("\n");
return 0;
}
int partition(int left, int right, int pivot) {
int leftPointer = left -1;
int rightPointer = right;
while(true) {
while(intArray[++leftPointer] < pivot) {
//do nothing
}
while(rightPointer > 0 && intArray[--rightPointer] > pivot) {
//do nothing
}
if(leftPointer >= rightPointer) {
break;
} else {
printf(" item swapped :%d,%d\n", intArray[leftPointer],intArray[rightPointer]);
swap(leftPointer,rightPointer);
}
}
printf(" pivot swapped :%d,%d\n", intArray[leftPointer],intArray[right]);
swap(leftPointer,right);
printf("Updated Array: ");
display();
return leftPointer;
}
void quickSort(int left, int right) {
if(right-left <= 0) {
return;
} else {
int pivot = intArray[right];
int partitionPoint = partition(left, right, pivot);
quickSort(left,partitionPoint-1);
quickSort(partitionPoint+1,right);
}
}
void swap(int num1, int num2) {
int temp = intArray[num1];
intArray[num1] = intArray[num2];
intArray[num2] = temp;
}