纯语法题

void solve()
{
	double x;
	string s = " card(s)";
	while(cin >> x, x){
		double now = 0.0, i = 2.0;
		int cnt = 0;
		while(now - x < 0.0){
			now += (1.0 / i);
			i += 1.0;
			cnt ++;
		}
		cout << cnt << s << endl;
	}
}