软硬件系统编程PPT (38).pdf

1、Write a good program Correctness Good program,first is a correct program Wrong knowledge Judgment of leap year:Being divisible by 4 is a leap year（wrong）Algorithm is wrong Robustness Does the code work well in various situations?Example(copy memory)The address given is incorrect(empty address?)Copy

2、the code to modify the address?Not enough memory space?Does the memory overlap between source and distance?Easy to understand Dont be too addicted to skills Typical Case:Use design patterns?Class factory?So,in a script that can be written in 80 lines,you end up using 10 classes,15 interfaces,plus a

3、lot of paradigms and tags,97%of the code does nothing.Choice easy to understand or code efficient?Keep it simple Code length control A method is printed in one A4 paper Split into multiple functions A small module(5-20 lines)Comments and naming Comments are important!The proportion of comments and c

4、ode is recommended(50%,50%)You can know the meaning when you see the name,try not to abbreviate src source pos position Code style Each language has its own different conventions Java The method name should start with a lowercase letter followed by a capital letter(veryLongVariableName)The class nam

5、es should all be connected using capitalized words Constant names should be all capitalized,connected by underscores(MY_CONSTANT)The left brace should be on the same line as the if statement Generally abide by,do not go against the routine Language feature Java for(int i=0;i 5;i+)Ruby Python print（*5)