static void Main(string[] args)
{
Cpu c1 = new Cpu();
c1.fun();
Cpu c2 = new IntelCpu();
c2.fun();
Cpu c3 = new CoreCpu();
c3.fun();
IntelCpu c4 = new CoreCpu();
c4.fun();
Type t1 = c1.GetType();
Type t2 = c2.GetType();
Type t3 = c3.GetType();
Type t4 = c4.GetType();
}