Question

java中如何实现复数的加减？

Answer 1

不知道是不是 ～
//复数类。

public class Complex
{
private double real,im; //实部，虚部

public Complex(double real, double im) //构造方法
{
this.real = real;
this.im = im;
}

public Complex(double real) //构造方法重载
{
this(real,0);
}

public Complex()
{
this(0,0);
}

public Complex(Complex c) //拷贝构造方法
{
this(c.real,c.im);
}

public boolean equals(Complex c) //比较两个对象是否相等
{
return this.real==c.real && this.im==c.im;
}

public String toString()
{
return "("+this.real+"+"+this.im+"i)";
}

public void add(Complex c) //两个对象相加
{ //改变当前对象，没有返回新对象
this.real += c.real;
this.im += c.im;
}

public Complex plus(Complex c) //两个对象相加，与add()方法参数一样不能重载
{ //返回新创建对象，没有改变当前对象
return new Complex(this.real+c.real, this.im+c.im);
}

public void subtract(Complex c) //两个对象相减
{ //改变当前对象，没有返回新对象
this.real -= c.real;
this.im -= c.im;
}

public Complex minus(Complex c) //两个对象相减，与subtract()方法参数一样不能重载
{ //返回新创建的对象，没有改变当前对象
return new Complex(this.real-c.real, this.im-c.im);
}
}

class Complex__ex
{
public static void main(String args[])
{
Complex a = new Complex(1,2);
Complex b = new Complex(3,5);
Complex c = a.plus(b); //返回新创建对象
System.out.println(a+" + "+b+" = "+c);
}
}

/*
程序运行结果如下：
(1.0+2.0i) + (3.0+5.0i) = (40.0+7.0i)

*/