实验报告(三)类和对象 (完整代码).doc

福建农林大学计算机与信息学院实验报告系 计算机专业年级12级成绩姓名学号实验室 机号实验时间教师签字实验（三） 类和对象一、实验目的和要求1. 掌握类的构造函数的重载2. 深入理解类和对象3. 学习NetBeans中UML项目的创建类并生成相应代码的方法二、实验内容和原理设计一个复数类，能够完成复数之间的基本运算，重写方法toString()，使其能输出此复数（形式为： 实部 + 虚部i）。要求设计的复数类必须有三个构造函数，分别为无参数、1个参数和2个参数的构造函数，完成的基本运算包括两个复数的加、减、乘、除法和变换了共轭复数。三、实验环境1. 硬件环境：2. 软件环境：JDK1.5四、算法描述及实验步骤1. 算法描述（可以用类图、流程图、伪代码或源程序描述）package complex;import java.util.Scanner;public class Complex private double realPart; private double imaginaryPart; public Complex() realPart = 0; imaginaryPart = 0; public Complex(double imaginary) imaginaryPart = imaginary; realPart = 0; public Complex(double real, double imaginary) imaginaryPart = imaginary; realPart = real; public double getrealPart() return realPart; public void setRealPart(double val) realPart = val; public double getimaginaryPart() return imaginaryPart; public void setlmaginaryPart(double val) imaginaryPart = val; public Complex plus(Complex complex) Complex add = new Complex(); add.realPart = realPart + complex.realPart; add.imaginaryPart = imaginaryPart + complex.imaginaryPart; return add; public Complex minus(Complex complex) Complex minus = new Complex(); minus.realPart = realPart - complex.realPart; minus.imaginaryPart = imaginaryPart - complex.imaginaryPart; return minus; public Complex times(Complex complex) Complex times = new Complex(); times.realPart = realPart * complex.realPart - imaginaryPart * complex.imaginaryPart; times.imaginaryPart = realPart * complex.imaginaryPart + imaginaryPart * complex.realPart; return times; public Complex divideby(Complex complex) Complex divide = new Complex(); divide.realPart = (realPart * complex.realPart - imaginaryPart * complex.imaginaryPart) / (complex.imaginaryPart * complex.imaginaryPart + complex.realPart * complex.realPart); divide.imaginaryPart = imaginaryPart * complex.realPart - realPart * complex.imaginaryPart; return divide; public Complex conjugate() Complex conjugate = new Complex(); conjugate.realPart = realPart; conjugate.imaginaryPart = -imaginaryPart; return conjugate; public void tostring() if (imaginaryPart = 1) System.out.println(realPart + + i); if (imaginaryPart = -1) System.out.println(realPart + -i); if (imaginaryPart != 1 & imaginaryPart != (-1) System.out.println(realPart + + ( + imaginaryPart + )i); public static void main(String args) Scanner input = new Scanner(System.in); System.out.println(复数a的实部和虚部分别是：); double areal = input.nextDouble(); double aimagine = input.nextDouble(); System.out.println(复数b的实部和虚部分别是：); double breal = input.nextDouble(); double bimagine = input.nextDouble(); Complex a = new Complex(areal, aimagine); Complex b = new Complex(breal, bimagine); Complex c = a.plus(b); System.out.print(a+b=); c.tostring(); Complex d = a.minus(b); System.out.print(a-b=); d.tostring(); Complex e = a.times(b); System.out.print(a*b=); e.tostring(); Complex f = a.divideby(b); System.out.print(a/b=); f.tostring(); System.out.println(a的共轭复数为：); a.conjugate().tostring(); System.out.println(b的共轭复数为：); b.conjugate().tostring(); 2. 实验步骤l 创建一个UML项目，并设计类Complex如下图l 创建一个Java应用项目l 把UML项目中的Complex自动生成代码到Java应用项目中l 实现Complex类中的方法l 进行编译l 进行测试，使用的测试用例：输入：预期输出：五、调试过程1. 编译过程记录算法实现中发现的语法错误及改正2. 调试过程记录算法实现中发现的逻辑错误及改正，对每个测试用例