Laboratory work 3,2

#include <iostream.h>
#include <math.h>
void main()
{
int a,n,i,k=0;
double s=0;
cout<<"\nEnter n";
cin>>n;
for(i=1;i<=n;i++)
{
cout<<"\nEnter a";
cin>>a;
s+=a;k++;
}
s=s/k;
cout<<"\nSr. arifm="<<s<<"\n";
}