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using namespace std;
//***************************************************
int partition( int arr[], int l, int r)
{
int pivot=arr[r];
int pIndex =l;
for(int i=l;i< r;i++)
{
if(arr[i]<=pivot)
{
int temp=arr[i];
arr[i]=arr[pIndex];
arr[pIndex]=temp;
pIndex++;
}
}
int temp=arr[r];
arr[r]=arr[pIndex];
arr[pIndex]=temp;
return pIndex;
}
//***********************************************************
void quicksort(int arr[], int l, int r)
{
if(l<r)
{
int p =partition( arr, l, r);
quicksort(arr,l,(p-1)); //recursive call for left partition
quicksort(arr, (p+1),r); //recursive call for right partition
}
}
//********************************************************
int main() //main function
{
int size =0;
cout<<"enter size of arrayn";
cin>>size;
int myarray[size];
cout<<"enter "<<size<<"integers in any ordern";
for(int i=0;i<size;i++)
{
cin>>myarray[i];
}
cout<<"array before sortingn";
for(int i=0;i<size;i++)
{
cout<<myarray[i]<<" ";
}
cout<<endl;
quicksort(myarray,0,(size-1)); //function called
cout<<"after sortingn";
for(int i=0;i<size;i++)
{
cout<<myarray[i]<<" ";
}
return 0;
}
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