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Create Quick sort.c
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sanjana-ravishankar committed Oct 26, 2021
1 parent 1e3aac9 commit cc03123
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54 changes: 54 additions & 0 deletions Quick sort.c
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#include<stdio.h>
// Function to swap two elements
void swapElements(int* x, int* y)
{
int temp = *x;
*x = *y;
*y = temp;
}
// Partition function
int partition (int arr[], int lowIndex, int highIndex)
{
int pivotElement = arr[highIndex];
int i = (lowIndex - 1);
int j;
for (j = lowIndex; j <= highIndex- 1; j++)
{
if (arr[j] <= pivotElement)
{
i++;
swapElements(&arr[i], &arr[j]);
}
}
swapElements(&arr[i + 1], &arr[highIndex]);
return (i + 1);
}

// QuickSort Function
void quickSort(int arr[], int lowIndex, int highIndex)
{
if (lowIndex < highIndex)
{
int pivot = partition(arr, lowIndex, highIndex);
// Separately sort elements before & after partition
quickSort(arr, lowIndex, pivot - 1);
quickSort(arr, pivot + 1, highIndex);
}
}
// Function to print array
void printArray(int arr[], int size)
{
int i;
for (i=0; i < size; i++)
printf("%d ", arr[i]);
}
// Main Function
int main()
{
int arr[] = {2,4,3,0,1,9,7,10,5};
int n = sizeof(arr)/sizeof(arr[0]);
quickSort(arr, 0, n-1);
printf("Sorted array: ");
printArray(arr, n);
return 0;
}

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