Learning_ introduction to computer science and programming_writing,testing,and debugging programs

writing,testing,and debugging programs

take it a step at time

　　1　understand problem

　　2　think about overall structure and algorithms independently of expression in programming language

　　3　break into small parts

　　4　identify useful abstractions(data and functional)

　　5　code and unit test a part at a time

　　6　first functionality, then efficiency

　　7　start with pseudo code

be systematic

whe ndebugging, think scientific method

ask yourself why program did whtat it did, not why it didn't do what you wanted it to do.