类构造函数是类的特殊成员函数,只要我们创建该类的新对象,该构造函数便会执行。默认构造函数没有任何参数。
以下是显示如何在C#中使用默认构造函数的示例-
using System; namespace LineApplication { 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