diff --git a/Quick sort/Basic Questions/Sorting an array using Quick Sort.cpp b/Quick sort/Basic Questions/Sorting an array using Quick Sort.cpp new file mode 100644 index 0000000..c07b0df --- /dev/null +++ b/Quick sort/Basic Questions/Sorting an array using Quick Sort.cpp @@ -0,0 +1,49 @@ +#include +using namespace std; +void swap(int* a, int* b) +{ + int t = *a; + *a = *b; + *b = t; +} +int partition (int arr[], int low, int high) +{ + int pivot = arr[high]; + int i = (low - 1); + + for (int j = low; j <= high - 1; j++) + { + if (arr[j] < pivot) + { + i++; + swap(&arr[i], &arr[j]); + } + } + swap(&arr[i + 1], &arr[high]); + return (i + 1); +} +void quickSort(int arr[], int low, int high) +{ + if (low < high) + { + int pi = partition(arr, low, high); + quickSort(arr, low, pi - 1); + quickSort(arr, pi + 1, high); + } +} +void printArray(int arr[], int size) +{ + int i; + for (i = 0; i < size; i++) + cout << arr[i] << " "; + cout << endl; +} +int main() +{ + int arr[] = {3, 25, 8, 19, 10, 5}; + int n = sizeof(arr) / sizeof(arr[0]); + quickSort(arr, 0, n - 1); + cout << "Sorted array: \n"; + printArray(arr, n); + return 0; +}