数据指针(DPTR)是单片机中一个功能比较特殊的寄存器,片外RAM寻址用的地址寄存器(间接寻址)可以将外部RAM中地址的内容传送到内部RAM的地址所指向的内容中。
... pointer to data affiliate 数据成员指针 pointer to data 数据指针 pointer to data 数据指针 ; 数据指标 ...
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这两个数据指针之间,有4个字节的间隔。
也就是说,它会在对象销毁时删除数据指针。
That is, it will delete the Pointers of data at the object destruction.
数据指针值无效。
Number three, pointer assignment, takes one pointer and changes it to point to the same pointee as another pointer so after the assignment the two pointers will point to the same pointee.
第三条,指针赋值,使一个指针,指向另外一个指针所指向的数据,赋值过后,两个指针会指向,同样的数据。
Number one, the basic structure is that you have a pointer and it points over to a pointee, but the pointer and pointee are separate and the common error is to set up a pointer but to forget to give it a pointee.
第一,基本结构是,你有一个,指向数据的指针,但是那个指针和数据,是分开的,通常错误是声明了一个指针,但是没有指向一个数据。
Number two, pointer dereferencing starts at the pointer and follows its arrow over to access its pointee.
第二,指针非关联化从指针开始,通过它的箭头,来使用它的指针数据。
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