Quick Sort in C

 A quick sort program that I wrote using C programming language.

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Program Listing

#include <stdio.h>
#include <stdlib.h>

  int  Quick_Sort(int *items, int left, int right) {
        int pivot = left;
        int i = left +1, j = right, temp;
        if (left < right) {
        while (1) {
                while (items[j] > items[pivot])
                        j--;
                while (items[i] <= items[pivot])
                        i++;
                if (i < j) {
                        temp = items[i];
                        items[i] = items[j];
                        items[j] = temp;
                } else
                        break;
        }
        temp = items[pivot];
        items[pivot] = items[j];
        items[j] = temp;
        Quick_Sort(items, left, j-1);
        Quick_Sort(items, j+1, right);
        }
        return 0;
  }

  int main() {
        int a=0,num=0, *items;
        
        printf("\n");
        printf("\tQuick Sort in C");
        printf("\n\n");
        printf("\tHow Many Items?  : ");
        scanf("%d", &num);
        items = (int *)malloc(sizeof (int) * num);
        printf("\n\n");
        for (a = 0; a < num; a++) {
        	    printf("\tEnter Value in Item No. %d : ",a+1);
                scanf("%d", &items[a]);
        }
        printf("\n\n");
        printf("\tBefore Sorting\n");
         printf("\n\n");
        printf("\t");
        for (a = 0; a < num; a++)
                printf("%5d",items[a]);
        printf("\n");
         Quick_Sort(items, 0, num-1);
         printf("\n\n");
        printf("\tAfter Sorting:\n");
         printf("\n\n");
          printf("\t");
        for (a= 0; a < num; a++)
                printf("%5d", items[a]);
        printf("\n\n");
        printf("\tEnd of Program");
        printf("\n");
  }