complex_number.java

快速傅立叶变换算法的实现

package ex4_fast_fourier_transform;

public class Complex_number {
	double real;
	double imagi;

	public Complex_number() {
		real = 0;
		imagi = 0;
	}

	public Complex_number(double x, double y) {
		real = x;
		imagi = y;
	}

	public Complex_number add(Complex_number a) {
		Complex_number c = new Complex_number();
		c.real = a.real + real;
		c.imagi = a.imagi + imagi;
		return c;
	}

	public Complex_number mult(Complex_number a) {
		Complex_number c = new Complex_number();
		c.real = a.real * real - a.imagi * imagi;
		c.imagi = a.real * imagi + real * a.imagi;
		return c;
	}

}