class PrimeNumberGenerator {
 public:
    int a;
    explicit PrimeNumberGenerator(int start) {
        a = start;
    }
    int GetNextPrime() {
        int s = 1;
        while (s != 2) {
            for (int i = 2; i < a; i++) {
                if (a % i == 0) {
                    s = 0;
                }
            }
            if (s == 0) {
                a += 1;
                s = 1;
            } else {
                s = 2;
            }
        }
        a += 1;
        return(a - 1);
    }
};