C# 中的默认构造函数是什么?
类构造函数是一个类的特殊成员函数,每当我们创建该类的对象时便会执行此函数。默认构造函数没有任何参数。
以下是一个展示如何在 C# 中使用默认构造函数的示例 -
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()); // set line length line.setLength(6.0); Console.WriteLine("Length of line : {0}", line.getLength()); Console.ReadKey(); } } }
输出
Object is being created, length = 10 Length of line : 10 Length of line : 6
广告