Data Structure Day01

To learn about Data Structure, I choose the course from Tsinghua University on Mooc.

Chapter 1

A.1

‘Computing’ & ‘Computer’

A.2

‘Rope Computer’

Input:Line L & a point on L called A

Output:Make a perpendicular to L throu A

Take 12 part equal rope ,set A+4 B , set A-3 C ;

then put A&B on rope on the ‘L’ then make a triangel.

“computer”: tool that can be used repeatedly and mechanically

A.3

‘Ruler Computer’