package dsu.servlets;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.GenericServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebServlet;

@WebServlet("/calc")
@SuppressWarnings("serial")
public class CalculatorServlet extends GenericServlet {

	@Override
	public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
		int v1=Integer.parseInt(request.getParameter("v1"));
		int v2=Integer.parseInt(request.getParameter("v2"));
		String operator = request.getParameter("op");
		int result=0;
		switch (operator)
		{
		case "+": result=v1+v2; break;
		case "-": result=v1-v2; break;
		case "*": result=v1*v2; break;
		case "/": result=v1/v2; break;
		}

		response.setContentType("text/html; charset=UTF-8"); // for http protocol
		PrintWriter pw = response.getWriter();
		pw.println(""+v1+" "+operator+" "+v2+" = "+result);
	}

}