addition.java

来自「这是用遗传编程算法来拟合曲线的一个经典程序」· Java 代码 · 共 20 行

/*作者：徐朝*/
/*[e-mail]*/
package regression.function;
import kernel.*;
//这是加法的定义
public class Addition extends Function {

	public Addition() {
		SubItems = new Program[2];
		symbol = "+";
	}

	public Object eval() 
	{
		double data1 =  ((Double)(SubItems[0].eval())).doubleValue();
		double data2 =  ((Double)(SubItems[1].eval())).doubleValue();
		return new Double(data1 + data2);
	}

}