溫暖午後的金針田__孕育有趣的創新

一、先來教個新技巧：把小數無條件捨去及四捨五入

並不是說有錯，只是這不太符合一般數學的思考邏輯，

《此文章是作者嘔心瀝血的財產，若要引用請附註引用自本網址，請尊重教學創作智慧財產權》

今天是第一次在本網誌寫程式筆記d(`･∀･)b(字型設定20)

切入正題啦～

來修改之前的成績登記程式吧～
之前的程式不夠嚴謹，如果輸入數字以外的東西，系統就會崩潰 Σ(*ﾟдﾟﾉ)ﾉ 

文章原發表於FB：https://goo.gl/Ug8nom 
發文日期：THURSDAY, MARCH 2, 2017

1. basic social problem-->Goods & services

• what the Goods & services will be produced?
  • opportunity cost
  • value of the best alternative given up
• how will the Goods & services be produced?
• who will receive the Goods & services produced

1. Making choive-->world of scarcity
2. Econmoics models are the simplified version of reality used to analyze real-world economics situation
3. three key ecomics ideas

• people are rational
• peolpe are responds to economics incentives
• optimal decision are made at the margin
  • considering MB and MC --> marginal anaslysis