本節(jié)練習
編寫程序，實現(xiàn)下列需求：計算下面fruit對象共有多少個水果，應(yīng)該輸出50。

var fruit = {
  apple: 20,
  pear: 20,
  peach: 10
};
// write your code here...

var fruit = {
  apple: 20,
  pear: 20,
  peach: 10
};
var t = fruit.apple+fruit.pear+fruit.peach; 
console.log(t);