You can compare it with a technical point in C language:

Define a char in c? Array of type

Charles? A []? =? { 1,2,3,4,5};

If you use it like this? Short? b？ =? * ((short *)a)； a);

In this way, the first two characters 1 2 of the char array are converted into short plastic data: b = 513; ? 0x 20 1；

Ptr in assembly? Similar to this function,

Meaning of words in data area

Answer? db？ 1,2,3,4,5,6,7

When using data,

mov？ ax，？ Words? ptr？ a

The first two bytes in A will be read into ax as a data, and word indicates that the data area will

The variable a is treated as a word type in the same way:

Definition? dw？ Answer? 0 102H

Moving? Al. Bytes? ptr？ A, only one byte will be processed.

ptr？ Provides you with a way to freely convert between different types of data.