01.06.2010

/*Se citeste de la tastatura o valoare naturala n (1elemente intregi.Sa se calculeze produsul elementelor prime din vector.*/
#include< iostream.h >
#include< math.h >
int main()
{int a[20],n,i,d,ok,p;
cout << "n=";cin >> n;
for(i=1;i<=n;i++)
{cout << "a[" << i << "]=";
cin >> a[i];
}
for(i=1;i<=n;i++)
cout << a[i] << " ";
p=1;
for(i=1;i<=n;i++)
{ok=1;
for(d=2;d<=a[i]/2;d++)
if(a[i]%d==0)
ok=0;
if(ok==1)
p=p*a[i];}
cout << "Produsul elementelor prime din vector este=" << p;
return 0;
}