finance (printf, scanf)

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

void main()
{
    float x, y, p, year = 0;
    printf("input x p y = ");
    scanf("%f %f %f", &x, &p, &y);
    while (x < y)
    {
        year++;
        x += x / 100 * p;
        x = nearbyint(x * 100) / 100;
    }
    printf("the result is %.0f\n\n", year);
    system("pause");
}