The pointer is the essence, focus and difficult of C language which is also the basis of C language Series. This article describes the arithmetic rules of pointer constants and variables in C language, as well as the access to the address.%指针是悦语言的精华、重点、难点，也是悦系列语言的基础。本文介绍了悦语言中的指针常量和指针变量的运算规则，以及对数组的访问。
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