C Program for Quick Sort

In this article, we will show you, How to write a C Program to Sort Array using Quick Sort with practical example.

C Program for Quick Sort Example

This quick sort program in C allows user to enter the array Size, and the row elements of an Array. Next, we are using Nested For Loop to sort the array elements using quick sort.

Here, we separated the logic using Functions and Pointers to swap and sort array elements by quick sort in c.

/* C Program for Quick Sort */
#include <stdio.h>
void Swap(int *x, int *y) {
    int Temp;
    Temp = *x;
    *x = *y;
    *y = Temp;
}
void quickSort(int a[], int first, int last) {
    int pivot, i, j;
    if(first < last) {
        pivot = first;
        i = first;
        j = last;
        while (i < j) {
            while(a[i] <= a[pivot] && i < last)
                i++;
            while(a[j] > a[pivot])
                j--;
            if(i < j) {
                Swap(&a[i], &a[j]);
            }
        }
        Swap(&a[pivot], &a[j]);
        quickSort(a, first, j - 1);
        quickSort(a, j + 1, last);
    }
}
int main() {
    int a[100], number, i;
    printf("\n Please Enter the total Number of Elements  :  ");
    scanf("%d", &number);
    printf("\n Please Enter the Array Elements  :  ");
    for(i = 0; i < number; i++)
        scanf("%d", &a[i]);
    
    quickSort(a, 0, number - 1);
    printf("\n Selection Sort Result : ");
    for(i = 0; i < number; i++)  {
        printf(" %d \t", a[i]);
    }
    printf("\n");
    return 0;
}

OUTPUT