2

#include<iostream>
#include<math.h>
using namespace std;

int main() {
    int a, b, s = 0, r, k, suma = 0;
    float d;
    cout << "Podaj zakres:" << endl;
    cin >> a >> b;
        for(int i = a; i <= b; i++) {
            int w = i;
            suma = 0;
            do{
            k = w % 10;
            suma += k;
            w -= k;
            w /= 10;
            } while (w != 0);

            if(suma!=1){
            s = 0;
            d = sqrt(suma);
            for (int j = 2; j <= d; j++) {
                r = suma%j;
                if (r == 0) {
                    s++;
                }
            }
            if (s == 0) {
                cout << i<<"->";
            }
        }

    }
    system("PAUSE");
    return 0;
}