java代码复数 java编程实现复数类

java编写复数

public class Complex {

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/**成员属性定义实部和虚部

*@param real_part 实部

*@param imagin_part 虚部

*/

private double real_part;

private double imagin_part;

//构造方法，初始化

public Complex() {

this(0.0,0.0);

}

//构造方法的重载

public Complex(double real_part, double imagin_part) {

this.real_part = real_part;

this.imagin_part = imagin_part;

}

//取得实部

public void getReal_part(double real_part) {

this.real_part = real_part;

}

//取得虚部

public void getImagin_part() {

this.imagin_part = imagin_part;

}

//复数自加

public Complex addComplex(Complex c) {

this.real_part += c.real_part;

this.imagin_part += c.imagin_part;

return this;

}

//复数自减

public Complex decComplex(Complex c) {

this.real_part -= c.real_part;

this.imagin_part -= c.imagin_part;

return this;

}

//定义输出格式

public String toString() {

//按照虚部正负，不同显示

if(this.imagin_part =0)

return this.real_part + "+" + this.imagin_part + "i";

return this.real_part + "-" + this.imagin_part + "i";

}

}

//测试类

class TestComplex {

public static void main(String[] args) {

//一个c1复数对象

Complex c1 = new Complex(1.0,1.0);

//输出自加结果

c1.addComplex(c1);

System.out.println(c1.toString());

//输出自减结果

c1.decComplex(c1);

System.out.println(c1.toString());

}

}

用java 编写一个复数类

public class Complex {

protected int a;

protected int b;

public Complex(int a, int b) {

this.a = a;

this.b = b;

}

public String toString() {

return this.a + " + " + this.b + "i";

}

public static Complex addition(Complex complex1, Complex complex2) {

int a = complex1.a + complex2.a;

int b = complex1.b + complex2.b;

return new Complex(a, b);

}

public static Complex subtract(Complex complex1, Complex complex2) {

int a = complex1.a - complex2.a;

int b = complex1.b - complex2.b;

return new Complex(a, b);

}

public static Complex multiplication(Complex complex1, Complex complex2) {

int a = complex1.a * complex2.a - complex1.b * complex2.b;

int b = complex1.b * complex2.a + complex1.a * complex2.b;

return new Complex(a, b);

}

public static Complex division(Complex complex1, Complex complex2) throws Exception {

if (complex2.a == 0) {

throw new Exception("complex2.a is 0");

}

if (complex2.b == 0) {

throw new Exception("complex2.b is 0");

}

int a = (complex1.a * complex2.a + complex1.b * complex2.b) / (complex2.a * complex2.a + complex2.b * complex2.b);

int b = (complex1.b * complex2.a - complex1.a * complex2.b) / (complex2.a * complex2.a + complex2.b * complex2.b);

return new Complex(a, b);

}

}

//测试用的类

public class ComplexTest {

public static void main(String[] args) throws Exception{

// TODO Auto-generated method stub

Complex complex1 = new Complex(1, 2);

Complex complex2 = new Complex(3, 4);

System.out.println(complex1 + " + " + complex2 + " = " + Complex.addition(complex1, complex2));

System.out.println(complex1 + " - " + complex2 + " = " + Complex.subtract(complex1, complex2));

System.out.println(complex1 + " x " + complex2 + " = " + Complex.multiplication(complex1, complex2));

System.out.println(complex1 + " / " + complex2 + " = " + Complex.division(complex1, complex2));

}

}

java 中实现复数的加减

（1）：具体代码(附注释)

复数类：

public class Complex {

private float shibu;

private float xubu;

Complex()

{this(0,0);

}

Complex(float shibu,float xubu){

this.shibu=shibu;

this.xubu=xubu;

}

public void Add(Complex p)

{

Complex result=new Complex();

result.shibu=this.shibu+p.shibu;

result.xubu=this.xubu+p.xubu;

System.out.print("加法结果为:"+result.shibu+"+"+result.xubu+"i");

}

public void Sub(Complex p)

{

Complex result=new Complex();

result.shibu=this.shibu-p.shibu;

result.xubu=this.xubu-p.xubu;

System.out.print("加法结果为:"+result.shibu+"+"+result.xubu+"i");

}

public void Mul(Complex p)

{

Complex result=new Complex();

result.shibu=this.shibu*p.shibu-this.xubu*p.xubu;

result.xubu=this.shibu*p.xubu+p.shibu*this.xubu;

System.out.print("乘法结果为:"+result.shibu+"+"+result.xubu+"i");

}

public static void main(String[] args) {

Complex fushu1=new Complex(1,2);

Complex fushu2=new Complex(3,4);

fushu1.Add(fushu2);

fushu1.Sub(fushu2);

fushu1.Mul(fushu2);

}

}

（2）：提供一个例子：

源代码：

import java.io.*;

public class Book{

double sb;

double xb;

Book(double x,double y){

this.sb=x;

this.xb=y;

}

Book(){

}

public static void main(String args[]){

System.out.println("请输入数据：");

double a=0;

double b=0;

double c=0;

double d=0;

String s;

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

System.out.println("请输入第一个复述的实部：");

try{

s = in.readLine();

a=Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

System.out.println("请输入第一个复述的虚部：");

try{

s = in.readLine();

b =Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

System.out.println("请输入第二个复述的实部：");

try{

s = in.readLine();

c =Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

System.out.println("请输入第二个复述的虚部：");

try{

s = in.readLine();

d =Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

Book h;

h=new Book(a,b);

Book j;

j=new Book(c,d);

System.out.println("您输入的一个数为：");

toString(h);

System.out.println("您输入的二个数为：");

toString(j);

Book k;

k=new Book();

char z='y';

do{

System.out.println("请选择您要进行的计算：");

System.out.println("1 ：进行加法运算");

System.out.println("2 ：进行减法运算");

System.out.println("3 ：进行修改");

System.out.println("4 ：进行乘法运算");

System.out.println("5 ：进行除法运算");

System.out.println("6 ：查看修改结果");

int i=0;

try{

i= Integer.parseInt(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

switch(i)

{

case 1:

k.sb=jia(h.sb,j.sb);

k.xb=jia(h.xb,j.xb);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 2:

k.sb=jian(h.sb,j.sb);

k.xb=jian(h.xb,j.xb);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 3:

System.out.println("请输入您要修改哪个实数：");

int l=0;

try{

l= Integer.parseInt(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

if(l==1)

{

h.xiugais(h);

h.xiugaix(h);

}

else

{

xiugais(j);

xiugaix(j);

}

break ;

case 4:

double f=0;

double e=0;

f=cheng(h.sb,j.sb)+cheng(h.xb,j.xb);

e=cheng(h.sb,j.xb)+cheng(h.xb,j.sb);

k.sb=(double)(Math.round(f*100)/100.0);

k.xb=(double)(Math.round(e*100)/100.0);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 5:

double chushu=cheng(j.sb,j.sb)-cheng(j.xb,-j.xb);

double beichushus=jian(cheng(h.sb,j.sb),cheng(h.xb,-j.xb));

double beichushux=jia(cheng(h.sb,-j.xb),cheng(h.xb,j.sb));

k.sb=chu(beichushus,chushu);

k.xb=chu(beichushux,chushu);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 6:

System.out.println("修改后的结果为：");

System.out.println("第一个复数："+toString(h));

System.out.println("第二个复数："+toString(j));

break ;

}

System.out.println("请问您是否还要继续 y/n：");

try{

z=(char)System.in.read();

System.in.skip(2); //忽略回车换行

}

catch(IOException e){}

} while(z=='y');

}

public static double gets(Book a){

return a.sb;

}

public static double getx(Book b){

return b.xb;

}

public static double xiugais(Book a)

{

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

System.out.println("请输入您要修改的实部：");

double m=0;

try{

m= Double.parseDouble(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

a.sb=m;

System.out.println("修改成功：");

return 0;

}

public static double xiugaix(Book b)

{

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

System.out.println("请输入您要修改的虚部：");

double n=0;

try{

n= Double.parseDouble(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

b.xb=n;

System.out.println("修改成功：");

return 0;

}

public static double jia(double a,double b)//

{

double c=0;

c=a+b;

System.out.println("加法成功：");

return c ;

}

public static double jian(double a,double b)

{

double c=0;

c=a-b;

System.out.println("减法成功：");

return c;

}

public static double cheng(double a,double b)

{

double c=0;

c=a*b;

System.out.println("乘法成功：");

return  c;

}

public static double chu(double a,double b)

{

double d=0;

double c=0;

d=a/b;

c=(double)(Math.round(d*100)/100.0);

System.out.println("除法成功：");

return c ;

}

public  static double toString(Book a){

System.out.println("结果为："+a.sb+"+"+a.xb+"*i");

return 0;

}

}

（3）测试结果截图：