Vector prim !

# include <iostream>
using namespace std;
int main()
{ int v[30],i,n,j,nr;
cout<<"n=";cin>>n;
for(i=1;i<=n;i++)
{
cout<<"v["<<i<<"]=";
cin>>v[i];
nr=0;
for(j=2;j<=v[i]/2;j++)
{
if(v[i]%j==0)
{ nr=1;}
}
if(nr==0)
cout<<"valoarea "<<v[i]<<" este prim"<<endl;
 }

}