Slip 7_1 : Sort a random array of n integers (accept the value of n from user) in ascending order by using quick sort algorithm.

-
 Solution :
#include<stdio.h>
void quicksort(int a[10],int lb,int ub);
main()
{ int n ,a[10],i,sr,j,temp;
 printf("\n enter no of elements");
 scanf("%d",&n);
 for(i=0;i<n;i++)
 {
 //printf("Enter no ");
 a[i]=rand()%100;
 }
 printf("\n Before sorted array is ");
 for(i=0;i<n;i++)
 {
 printf("%d ",a[i]);
 }
 quicksort(a,0,n-1);
 printf("\n Sorted array is ");
 for(i=0;i<n;i++)
 {
 printf("%d ",a[i]);
 }
}
void quicksort(int a[10],int lb,int ub)
{ int key,temp,i,j;
 if(lb<ub)
 {
 i=lb+1;
 key=a[lb];
 j=ub;
 while(i<=j)
 {
 while(a[i]<=key && i<=ub)
 i++;
 while(a[j]>key && j>=lb)
 j--;
 if(i<j)
{
 temp=a[i];
 a[i]=a[j];
 a[j]=temp;
 }
 }
 //swap key and a[j]
 temp=a[j];
 a[j]=a[lb];
 a[lb]=temp;
 quicksort(a,lb,j-1);
 quicksort(a,j+1,ub);
 }
}

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