C#入门学习教程《第7章实验报告2》.doc

实验报告课程名称：C#程序设计 实验地点： 班级学号姓名一、实验名称多态二、实验目的通过本章学习，理解多态的概念，掌握多态实现方式，掌握方法隐藏基类方法及方法重写。三、实验内容1创建一个类Complex表示复数复数包含实部（RealPart）和虚部（ImaginaryPart）；添加默认构造函数和具有2个参数的重载构造函数：默认构造函数将实部和虚部初始化为0重载构造函数为实例化对象时给对象赋值用new关键字隐藏基类方法ToString()方法，方法返回值形式如“2+3i”；创建方法public static Complex Add(Complex a, Complex b)，实现两相复数相加；创建方法public static Complex Sub(Complex a, Complex b)，实现两个复数相减。2编写一个Windows应用程序，计算两个复数之和和之差，如(4+5i)+(6-7i)和(4+5i)-(6-7i)，并显示的结果四、实验报告1源代码 class Complex private double realpart; public double Realpart get return realpart; set realpart = value; private double imaginarypart; public double Imaginarypart get return imaginarypart; set imaginarypart = value; public Complex() this.realpart = 0.0; this.imaginarypart = 0.0; public Complex(double realpart, double imaginarypart) this.realpart = realpart; this.imaginarypart = imaginarypart; public static Complex Add(Complex a, Complex b) Complex c = new Complex(); c.Realpart = a.realpart + b.realpart; c.Imaginarypart = a.imaginarypart + b.imaginarypart; return c ; public static Complex Sub(Complex a, Complex b) Complex d = new Complex(); d.Realpart = a.realpart -b.realpart; d.Imaginarypart = a.imaginarypart - b.imaginarypart; return d; public new string ToString() if (imaginarypart = 0) return string.Format(0 + 1 + i, realpart, imaginarypart); return string.Format(0 + 1 + i, realpart, imaginarypart); public partial class Form1 : Form bool a = true; public Form1() InitializeComponent(); private void button1_Click(object sender, EventArgs e) double a1, b1, a2, b2; a1 = double.Parse(textBox1.Text); b1 = double.Parse(textBox2.Text); a2 = double.Parse(textBox3.Text); b2 = double.Parse(textBox4.Text); Complex c1 = new Complex(a1, b1); Complex c2 = new Complex(a2, b2); Complex c3 = Complex.Add(c1, c2); MessageBox.Show(c3.ToString(); Fun(); private void button2_Click(object sender, EventArgs e) double a1, b1, a2, b2; a1 = double.Parse(textBox1.Text); b1 = double.Parse(textBox2.Text); a2 = double.Parse(textBox3.Text); b2 = double.Parse(textBox4.Text); Complex c1 = new Complex(a1, b1); Complex c2 = new Complex(a2, b2); Complex c3 = Complex.Sub(c1, c2); MessageBox.Show(c3.ToString(); Fun(); private void Fun(