DSA Bubble sort

#include <iostream>
using namespace std;
int main()
{
int n;
cout<<"Enter no. of elements: ";
cin>>n;
int a[n];
for(int i=0; i<n ;i++)
{
cout<<"Enter #"<<i<<": ";
cin>>a[i];
}
for(int i=0; i<n-1; i++)
{
for(int j=0; j<n-i-1; j++)
{
if(a[j]>a[j+1])
{
int t = a[j];
a[j] = a[j+1];
a[j+1] = t;
}
}
}
cout<<"\nAfter Sorting: "<<endl;
for(int i=0; i<n; i++)
cout<<a[i]<<" ";
return 0;
}