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Listing 3-7 #30

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carpajr opened this issue Oct 23, 2019 · 1 comment
Closed

Listing 3-7 #30

carpajr opened this issue Oct 23, 2019 · 1 comment

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@carpajr
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@carpajr carpajr commented Oct 23, 2019

Hello, Josh!

At example 3-7, I found something that I have a question.

1. #include <cstdio>
2. int main() {
3.     char lower[] = "abc?e";
4.     char upper[] = "ABC?E";
5.
6.     char* upper_ptr = &upper[0];
7.     *(lower + 3) = 'd';
8.     *(upper_ptr + 3) = 'D';
9.
10.    char letter_d = *(lower + 4); // lower decays into a pointer when we add
11.    char letter_D = *(upper_ptr + 4);
12.
13.    printf("lower: %s\nupper: %s", lower, upper);
14.    *(lower + 7) = 'g';
15. }

The lines 10 and 11 points to offset 4, but I think the offset is 3. What do you think?

I have to mention that your book is fantastic! It has been a long time since I had found such an enjoyable approach. I have to say that your book became a bedside book. Thanks for your excellent work!

Regards from Brazil

@JLospinoso
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@JLospinoso JLospinoso commented Oct 23, 2019

Hi @carpajr, you are absolutely correct. Thanks very much for reporting! I really hope you enjoy the rest of the book :-)

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