complexnumber.txt

复数之间的加减乘除运算（Java） 复数之间的运算-分为实部和实部间运算

//复数的加减乘除运算ComplexNumber
public class ComplexNumber{
    private double realPart;
    private double imaginPart;
    ComplexNumber(){
    	realPart = 0.0;
        imaginPart = 0.0;
    } 
    ComplexNumber(double r,double i){
    	realPart = r;
        imaginPart = i;
    }
    ComplexNumber(ComplexNumber c){
    	realPart = c.getReal();
        imaginPart = c.getImagin();
    }
    double getReal(){
    	return realPart;
    }
    double getImagin(){
    	return imaginPart;
    }
    void setReal(double r) {
    	
        realPart = r;
    }
    void setImagin(double i) {
        imaginPart = i;
    }

    ComplexNumber complexAdd(ComplexNumber c){
         return new ComplexNumber(realPart + c.getReal(),imaginPart+ c.getImagin());
    }

    ComplexNumber complexMinus(ComplexNumber c){
        return new ComplexNumber(realPart - c.getReal(),imaginPart - c.getImagin());
    }

    ComplexNumber complexMulti(ComplexNumber c){
        return new ComplexNumber(realPart * c.getReal() - imaginPart * c.getImagin(),realPart * c.getImagin() +imaginPart * c.getReal());
    }

    ComplexNumber complexDiv(ComplexNumber c){
    	if(c.getReal()==0&&c.getImagin()==0){
    		System.out.println("错误!分母不能为零");
    	}
    	ComplexNumber c2 = new ComplexNumber(realPart, -imaginPart); 
        ComplexNumber m=  c2.complexMulti(c); 
        m.realPart /=realPart * m.getReal() +imaginPart * m.getImagin(); 
        m.imaginPart /=realPart * m.getImagin() +imaginPart * m.getReal(); 
        return m; 
    }
    public String toStr(){
    	return realPart + " + (" + imaginPart +") i";
    }
    public static void main(String args[]){
        ComplexNumber Num1 = new ComplexNumber(1,9);
        ComplexNumber Num2 = new ComplexNumber(2,0);
        System.out.println(Num1.complexAdd(Num2).toStr());
        System.out.println(Num1.complexMinus(Num2).toStr());
        System.out.println(Num1.complexMulti(Num2).toStr());
        System.out.println(Num1.complexDiv(Num2).toStr());
    }
}