Prime number

#include <iostream>using namespace std;int main() {	long x;	int i = 2;	cin >> x;	do {		long a=2;		int p=0;		for (a;a<=i;a++) {			if ((i%a)==0 && (i != a) || i == 1) {				a=i;				p=1;			}		}		if (p==0) {			cout << i << endl;		}		i++;	}while (i < x);	return 0;}