static void Main(string[] args)
{
//Student
Student s1 = new Student();
s1.Name = "Nahid";
s1.Id = "19-39998-1";
s1.Department = "CSCE";
s1.Cgpa = 3.00f;
s1.Showinfo();
//Triangle
Triangle t1 = new Triangle();
t1.X = 5;
t1.Y = 5;
t1.Z = 5;
t1.Showinfo();
t1.TestTriangle();
//Course
Course c1 = new Course();
c1.CourseName = "OOP2";
c1.CourseCode = "007";
c1.CourseCredit = 3;
c1.ShowCourseinfo();
//Account
Account a1 = new Account();
a1.AccName = "Fixed";
a1.AcId = "007";
a1.Balance = 10000;
a1.Showinfo();
a1.Deposit();
a1.Withdraw();
}