calc.java

面向对象设计的Java计算器

import java.io.*;
public class calc {

	/**
	 * @param args
	 * @param b 
	 */
	public static void main(String[] args) {
		try{
			double NumberA, NumberB;String Operate;
		BufferedReader in;
		System.out.print("请输入 数字A：");		
		    in=new BufferedReader( 
			       new InputStreamReader(System.in));
		    NumberA=Double.parseDouble(in.readLine());
		System.out.print("请输入  运算符号（+,-,*,/）：");
		Operate=in.readLine();
		System.out.print("请输入 数字B：");
		NumberB=Double.parseDouble(in.readLine());
		Operation oper;
		oper=OperationFactory.createOperate(Operate);
		oper.setNumberA(NumberA);
		oper.setNumberB(NumberB);
		System.out.println(oper.GetResult()+"");
		}catch(IOException e){e.printStackTrace();}
	}

}