public void TestCountDiv()
{
int A = 6, B = 11, K = 2;
int expected = 3;
int actual = Lessons.CountDiv(A, B, K);
Assert.AreEqual(expected, actual);
A = 11; B = 345; K = 17;
expected = 20;
actual = Lessons.CountDiv(A, B, K);
Assert.AreEqual(expected, actual);
A = 0; B = 0; K = 11;
expected = 1;
actual = Lessons.CountDiv(A, B, K);
Assert.AreEqual(expected, actual);
}