finance (cout cin)

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

void main()
{
    float x, y, p, year = 0;
    cout << "input x p y = ";
    cin >> x >> p >> y;
    while (x < y)
    {
        year++;
        x += x / 100 * p;
        x = nearbyint(x * 100) / 100;
    }
    cout << "the result is " << year << "\n\n";
    system("pause");
}