Create a class

Plural class

Comprising a plurality of generating, addition and subtraction, and the return portion and an imaginary portion fact

package lei;

public class fushu1 {

public static void main(String[] args) {
	// TODO Auto-generated method stub
	Complex a=new Complex(2,3);
	Complex b=new Complex(4,5);
	Complex c=a.Add(b);
	Complex d=b.Add(a);
	
	System.out.println("复数a="+a.tosting());
	System.out.println("复数b="+b.tosting());
	
	System.out.println("a的实部为"+a.getreal());
	System.out.println("a的虚部为"+a.getimg());
	
	System.out.println("复数c="+c.tosting());
	System.out.println("复数d="+d.tosting());
     }

}

class Complex
{
   private double real;    //private表示私有，其他不能访问或改变，需写一个返回函数
   private double img;
Complex()
   {
	real=0;
	img=0;
  }
Complex(double n1,double n2)
   {
	real=n1;
	img=n2;
  }
String tosting()
  {
	return real+"+"+img+"i";
  }
Complex Add(Complex b)
  {
	Complex c=new Complex();
	c.real=this.real+b.real;
	c.img=this.img+b.img;
	return c;
  }
double getreal()     //返回其私有值，在主函数中调用
    {
	  return real;
    }
double getimg()
    {
	  return img;
    }
}