在构造函数中,您还可以添加参数。这种构造函数称为参数化构造函数。此技术可帮助您在创建对象时为它分配初始值。
以下是一个例子-
// class class Demo
具有参数等级的参数化构造函数-
public Demo(int rank) { Console.WriteLine("RANK = {0}", rank); }
这是显示如何在C#中使用参数化构造函数的完整示例-
using System; namespace Demo { class Line { private double length; // Length of a line public Line(double len) { //Parameterized constructor Console.WriteLine("Object is being created, length = {0}", len); length = len; } public void setLength( double len ) { length = len; } public double getLength() { return length; } static void Main(string[] args) { Line line = new Line(10.0); Console.WriteLine("Length of line : {0}", line.getLength()); //设置线长 line.setLength(6.0); Console.WriteLine("Length of line : {0}", line.getLength()); Console.ReadKey(); } } }
输出结果
Object is being created, length = 10 Length of line : 10 Length of line : 6