Program for Bubble sort

#include<iostream>
using namespace std;
int main()
{
 int i,j,n;
 cout<<"\nenter the no of integers : ";
 cin>>n;
 double a[n],temp;
 int k=n;
 cout<<"\nenter the integers : ";
 for(i=0;i<n;i++)
 {
  cin>>a[i];
 }
 cout<<"\narray before sorting : ";
 for(i=0;i<n;i++)
 {
  cout<<a[i]<<" ";
 }
 cout<<"\n";
 
 for(i=0;i<n-1;i++)
 {
  for(j=1;j<(n-i);j++)
  {
   if(a[j-1]>a[j])
   {
    temp=a[j];
    a[j]=a[j-1];
    a[j-1]= temp;
   }
  }
 }
 cout<< "\narray after sorting :";
 for(i=0;i<n;i++)
 {
  cout<< a[i]<< " ";
 }
 cout<<"\n";
 return 0;
}