Project Code Write

1. In the funciton block, the position where does variables definition responsed in variables name in my suggest . like prefix definition: g_ is a globle member , s_is a static memeber,m_ is a member , p_ is a parameter , t_ is a temp variable ,c_ is a const variable ,etc .
2. all the prefix can composite to together ,of course, some of them may be exclude .
3. cp_ stand for , this variable is const&parameter of the function .
4. use if/else if to dispatch all of the posibility , if/else if cover all of the already-known condition , the last else is for the defaute or unknown condition process ,but not the last condition process .if there are three condition ,so it can be / must be like this :

   　　if(condition1){}

   　　else if(condition2){}

   　　else if(condition3){}

   　　else{}

   　 Can not write like this :

   　　if(condition1){}

   　　else if(condition2){}

   　　else{}// process for condition3 .

   　　make all of process explicity ,and do a helper for reverse-engin--he can known the three  condition only read this source code ,other wise he must read some document for the third condition ,if there is no document , he will be crazy .

5. If possible , logic process and pure data process write to different class . what is logic and how to recognize it ? if something belong to bussiness , it is logic ; logic orgnize data to meaning information .