const char & char const
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1.const char *p (read-only location ‘*p’ *p 不能再赋值, 但p可以再赋值):常量数据
p is a const char pointer, so the memory that p refer to is constant, that is you cant change it.
2.char * const p (read only variable p, 但所指内容*p我变变变) :常量指针
p is a constant char *, that is p is const char point, so p cant not be changed. p++ like operation is illegal.
3.char const *p (read-only location ‘*p’ *p 不能再赋值, 但p可以再赋值):常量数据
same as 1
4.const char * const p(read-only location ‘*p’ , read-only variable ‘p’) :常量数据 常量指针
p is constant pointer that refer to a constant memory.
p cant be changed, and *p can't be changed.
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