internal static void method2()
{
Console.WriteLine("Static Method");
Console.WriteLine("=========");
MethodDemo o = new MethodDemo();
Console.WriteLine("Thong bao 1: {0}", o.message);
Console.WriteLine("Thong bao 2: {0}", MethodDemo.message2);
}
static void Main(string[] args)
{
string op = "";
MethodDemo md = new MethodDemo();
int a = 0, b = 0, c = 0;
double x1 = 0, x2 = 0;
while (true)
{
Console.Clear(); // xóa màn hình
Console.WriteLine("====== MENU ======");
Console.WriteLine("1. Default parameter");
Console.WriteLine("2. Static members");
Console.WriteLine("3. Giai PT bac 2 (pass by value - default)");
Console.WriteLine("4. Giai PT bac 2 (pass by reference)");
Console.WriteLine("5. Exit");
Console.Write("Input function number[1-5]: ");
op = Console.ReadLine().Trim();
switch (op)
{
case "1":
md.method1();
md.method1("Hello, .NET Framework !");
break;
case "2":
MethodDemo.method2();
break;
case "3":
Console.Write("Nhap a: ");
a = int.Parse(Console.ReadLine().Trim());
Console.Write("Nhap b: ");
b = int.Parse(Console.ReadLine().Trim());
Console.Write("Nhap c: ");
c = int.Parse(Console.ReadLine().Trim());
if (md.ptb2(a, b, c, x1, x2))
{
Console.WriteLine("\n Phuong trinh bac 2 : {0}x2+ {1}x +{2} co 2 nghiem: ", a, b, c);
Console.WriteLine("x1 = {0:F2}, x2 ={1:F2}", x1, x2);
}
else
{
Console.WriteLine("Phuong trinh vo nghiem! ");
}
break;
case "4":
Console.Write("Nhap a: ");
a = int.Parse(Console.ReadLine().Trim());
Console.Write("Nhap b: ");
b = int.Parse(Console.ReadLine().Trim());
Console.Write("Nhap c: ");
c = int.Parse(Console.ReadLine().Trim());
if (md.ptb2bis(a, b, c, ref x1, ref x2))
{
Console.WriteLine("\n Phuong trinh bac 2 : {0}x2+ {1}x1 +{2} co 2 nghiem: ", a, b, c);
Console.WriteLine("x1 = {0:F2}, x2 ={1:F2}", x1, x2);
}
else
{
Console.WriteLine("Phuong trinh vo nghiem! ");
}
break;
case "5": return;
default: break;
}
Console.Write("Press any key to continue ...");
Console.ReadKey();
}
}