public void TestGradeBook()
{
//arrange
var book = new GradeBook.Book("C++");
book.AddBookGrade(1.33);
book.AddBookGrade(5.33);
book.AddBookGrade(3.33);
//act
var result = book.ShowStaticstic();
//assert
Assert.Equal(5.333, result, 2);
}
static void Main(string[] args)
{
var book = new Book("C# Programming");
book.AddBookGrade(5.66);
book.AddBookGrade(33.66);
book.AddBookGrade(522.66);
book.AddBookGrade(2.66);
book.AddBookGrade(325.66);
book.AddBookGrade(333.66);
book.ShowStaticstic();
}