C#构造函数的重载.doc

C#构造函数的重载C#中的构造函数也可以应用方法重载。C#中有默认构造函数，也可以定义带参数的构造函数。构造函数必须与类同名，并且不能有返回值。所以C#构造函数重载相当于不同数量的参数方法重载。using System;class Animalpublic string _name;public string _color;public int _speed;public Animal() this._speed = 30;public Animal(string name, string color) this._name = name; this._color = color;public Animal(string name, string color, int speed) this._name = name; this._color = color; this._speed = speed;class Programstatic void Main(stringargs) /方法一 Animal animal1 = new Animal(); animal1._name = 兔子; animal1._color = 灰色; /animal1._speed = 40; Console.WriteLine( 调用默认构造函数输出动物为0，颜色为1，奔跑速度为2km/h, animal1._name, animal1._color, animal1._speed); /方法二 Animal animal2 = new Animal(狗, 黄色); Console.WriteLine(调用两个参数构造函数输出动物为0，颜色为1, animal2._name, animal2._color); /方法三 Animal animal3 = new Animal(花猫, 白色, 20); Console.WriteLine( 调用三个参数构造函数输出动物为0,颜色为1,奔跑速度为2, animal3._name, animal3._color, animal3._speed); Console.WriteLine(一只 + animal3._color + 的 + animal3._name + 正在以 + animal3._speed + km/h的速度在奔跑n); Console.ReadLine();我们再看一个例子:using System;class Programprivate string _name;private int _age;private string _qualification;public Program() _age = 18;public Program(string name, int age, string qualification) this._name = name; this._age = age; this._qualification = qualification;static void Main() Program p = new Program(); Console.WriteLine(默认构造函数输出年龄为 + p._age); Program p1 = new Program(李公, 19, 大学); Console.WriteL