1.遵循C++规定的变量及函数命名方法；
2.原则：简单，易于理解；
以下是一些例子，可以作为参考：
//bad examples:
int ccount;//Nobody knows what a ccount is.
int i;//Generally bad unless use is trivial or temporary, such as loop variables.
int _count;//don't start variable names with underscore.
int data;//What kind of data?
int value1,value2;//Can be hard to differentiate between the two?
int x,y;//generally bad unless use is trivial, such as in trivial mathematical functions. //good examples:
int customerCount;//clear what we're counting
int index;//okay if obvious what we're indexing
int totalScore;//good descriptive
int numberOfApples;//descriptive
int monstersKilled;//descriptive