If EA = 1; is added before the statement TI = 1;, the following warning will appear:
* error 65: access violation at C:0x0023: no 'execute/read' permission
This warning means that the program has run away.
Just put the statement EA = 1; before TI = 1; or put it somewhere else. The error will disappear and the sp value will be normal. See the picture for details.
Other possible reasons for the program running away:
https://blog.csdn.net/wacflp/article/details/67637506
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