The most important thing in a program is the data structure.
"The only thing necessary for the triumph of evil is for good men to do nothing."
You want to be extra rigorous about making the best possible thing you can. Find everything that's wrong with it and fix it. Seek negative feedback, particularly from friends.
学习不仅仅是存储信息的问题;它是一个通过改变支配行为的规则来适应环境的过程。