Views on the bug of the compiler in deep anatomy of C language (Chen zhengchong) 4.1.5

I wanted to post it to the author's blog but could not find the address.

I will not write the details of the original article, but I want to point out the following:

I did not dare to say this was a bug in vc6.0, but my result is that the address of the first variable defined by vc6.0 is 0x12ff7c !!!

This explains the problems mentioned in this article!

When the first variable defined is a pointer, the address of this pointer variable is 0x12ff7c! Therefore, * P = NULL indicates that the address (that is, P) is null!

As for the code above, the pointer occupies 4 bytes, And the char character occupies 1 byte, that is, the explanation in this article.

 

Define the pointer at the beginning, and then change the value of pointer P to 0x12ff7c!