public class Person {
public DateTime birth;
public DateTime? death;
string name;
public TimeSpan Age {
get {
if (!death.HasValue) {
return DateTime.Now - birth;
}
else {
return death.Value - birth;
}
}
}
public TimeSpan Age1 {
get {
DateTime lastAlive = death.HasValue ? DateTime.Now : death.Value;
return birth - lastAlive;
}
}
public TimeSpan Age2 {
get {
return (death ?? DateTime.Now) - birth;
}
}
//构造函数
public Person(string name, DateTime birth, DateTime? death) {
this.birth = birth;
this.death = death;
this.name = name;
}
}
Person tr = new Person("AAAA", new DateTime(1988, 12, 13),null); Person kk = new Person("BBBB", new DateTime(1912, 12, 13), new DateTime(1954, 12, 12)); Console.ReadKey();
-