using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace CcharpPatternDesign { class Rectangle { // 成员变量 double length; double width; public void Acceptdetails() { length = 4.5; width = 3.5; } public double GetArea() { return length * width; } public void Display() { Console.WriteLine("Length: {0}", length); Console.WriteLine("Width: {0}", width); Console.WriteLine("Area: {0}", GetArea()); } } class Program { static void Test(ref Rectangle r) { r.Acceptdetails(); r.Display(); } static void Test2(Rectangle r) { if (r == null) { Console.WriteLine("Invalid parameter!"); } else { r.Acceptdetails(); r.Display(); } } static void Main(string[] args) { Rectangle r = new Rectangle(); r.Acceptdetails(); r.Display(); Test(ref r);//传引用 Test2(null);//传值,所以这种情况,对象有可能对空,那么我就需要加以判断 Test2(r);//传值 } } }
传值、转引用的代码示例
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转载自jacky-dai.iteye.com/blog/2319058
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