Buat kalkulator web dengan node.js express

npm install -g express-generator

npm install -g express

express -e calculator
cd calculator && npm install

var express = require('express'); 
var router = express.Router(); 
 
/* GET home page. */ 
router.get('/', function(req, res, next) { 
 res.render('index', {  
  title: '计算器V1.0 by jdh', 
  numa: 0, 
    numb: 0, 
    sum: 0 
 }); 
}); 
 
router.post('/', function (req, res) { 
  console.log("接收:", req.body.num1, req.body.num2); 
  var sum = parseFloat(req.body.num1) + parseFloat(req.body.num2); 
  console.log('sum = ',sum); 
   
  res.render('index', {  
  title: '计算器V1.0 by jdh', 
// numa: req.body.num1, 
//   numb: req.body.num2 
    numa: req.body.num1, 
    numb: req.body.num2, 
    sum: sum 
 }); 
}); 
   
module.exports = router;