NotFoundException Exception . */
public NotFoundException () base() { }
public NotFoundException(string str): base(str) { }
Public NotFoundException (
string str,Exception inner): base(str, inner) { } protected NotFoundException(
System.Runtime.Serialization.Serializationlnf si,
System.Runtime.Serialization.StreamingContext sc): base (si, sc) { }
}
// , , class PhoneNumber {
public PhoneNumber(string n, string num) {
Name = n;
Number = num;
}
public string Number { get; set; } public string Name { get; set; }
}
// , class Friend: PhoneNumber {
public Friend(string n, string num, bool wk): base(n, num)
IsWorkNumber = wk;
}
public bool IsWorkNumber { get; private set; }
//...
}
// , class Supplier: PhoneNumber {
public Supplier(string n, string num): base(n, num) { }
//...
}
// PhoneNumber. class EmailFriend {
//...
}
// PhoneList , // , PhoneNumber. class PhoneList<T> where T: PhoneNumber {
T[] phList; int end;
public PhoneList() { phList = new T[10]; end = 0;
}
// , public bool Add(T newEntry) { if(end == 10) return false;
phList[end] = newEntry; end++; return true;
}
// , public FindByName(string name) {
for(int i=0; i<end; i++) {
// , Name // PhoneNumber, // , if(phList[i].Name == name) return phList[i];
}
// , throw new NotFoundException();
// , public FindByNumber(string number) { for(int i=0; i<end; i++) {
// " , // Number PhoneNumber, // , if(phList[i].Number == number) return phList[i];
}
// . throw new NotFoundException ();
}
//...
}
// , class UseBaseClassConstraint { static void Main() {
// , // Friend PhoneNumber.
PhoneList<Friend> plist = new PhoneList<Friend>(); plist.Add(new Friend("", "555-1234", true)); plist.Add(new Friend("", "555-6756", true)); plist.Add(new Friend("", "555-9254", false));
try {
// .
Friend frnd = plist.FindByName("");
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Console.Write(frnd.Name + ": " + frnd.Number);
If(frnd.IsWorkNumber)
Console.WriteLine(" ()"); else
Console.WriteLine ();
} catch(NotFoundException) {
Console.WriteLine("He ");
}
Console.WriteLine();
// , // Supplier PhoneNumber.
PhoneList<Supplier> plist2 = new PhoneList<Supplier>(); plist2.Add(new Supplier(" Global Hardware", "555-8834")); plist2.Add(new Supplier (" Computer Warehouse", "555-9256")); plist2.Add(new Supplier(" NetworkCity", "555-2564")); try {
// . Supplier sp = plist2.FindByNumber("555-2564");
Console.WriteLine(sp.Name + ": " + sp.Number);
} catch(NotFoundException) {
Console.WriteLine("He ");
}
// ,
// EmailFriend PhoneNumber.
// PhoneList<EmailFriend> plist3 =
// new PhoneList<EmailFriend>(); // !
}
}
.
: 555-6756 ()
NetworkCity: 555-2564
. , IsWorkNumber PhoneList. , , IsWorkNumber Friend, PhoneNumber, , PhoneList.
, . , . -, . -, , . , , , , .
, where:
where : _
, _ . . , .
, , . PhoneNumber I PhoneNumber, Friend Supplier.
// , using System;
// , ,
// , class NotFoundException: Exception {
/* Exception.
. NotFoundException Exception . */
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public NotFoundException(): base() { }
public NotFoundException(string str): base(str) { }
Public NotFoundException(
string str,Exception inner): base(str, inner) { }
protected NotFoundException (
