User Lundin - Stack Overflow

142 votes

5 answers

49k views

Implicit type promotion rules

asked Sep 6, 2017 at 10:50

121 votes

7 answers

6k views

Redefining NULL

asked Feb 28, 2011 at 12:53

104 votes

3 answers

16k views

Correctly allocating multi-dimensional arrays

asked Feb 7, 2017 at 16:02

68 votes

5 answers

14k views

Crash or 'segmentation fault' when data is copied/scanned/read to an uninitialized pointer

asked May 31, 2016 at 15:17

60 votes

4 answers

8k views

How to create type safe enums?

asked Mar 27, 2017 at 9:54

59 votes

4 answers

23k views

Why is the maximum size of an array "too large"?

asked Mar 3, 2017 at 9:17

55 votes

6 answers

6k views

What's the meaning of "reserved for any use"?

asked Sep 17, 2018 at 12:13

36 votes

2 answers

3k views

Why isn't the keyword false an integer constant expression in gcc C23?

asked Feb 6 at 14:11

20 votes

2 answers

2k views

What is the meaning of "producing negative zeroes" in a system that doesn't support it?

asked Mar 7, 2019 at 12:55

20 votes

1 answer

6k views

Dynamic memory access only works inside function

asked Sep 14, 2016 at 9:20

19 votes

0 answers

332 views

realloc(ptr, 0) in C23 - now what?

asked Jul 1 at 8:12

18 votes

3 answers

3k views

Const correctness for array pointers?

asked Mar 24, 2016 at 11:49

16 votes

2 answers

9k views

Is this a valid way of checking if a variadic macro argument list is empty?

asked Mar 29, 2019 at 12:10

16 votes

1 answer

1k views

What is C11 cor 1:2012?

asked Dec 17, 2012 at 12:19

16 votes

4 answers

3k views

How should character arrays be used as strings?

asked Oct 23, 2019 at 15:17

15 votes

1 answer

5k views

"Pointer from integer/integer from pointer without a cast" issues

asked Sep 5, 2018 at 13:52

13 votes

3 answers

2k views

Why can I use gets() in gcc -std=c11?

asked Jun 3, 2015 at 12:12

10 votes

2 answers

281 views

Does nullptr_t break type punning or pointer conversions?

asked Aug 15, 2023 at 13:39

10 votes

1 answer

326 views

clang 15 miscompiles code accessing indeterminate values

asked Feb 22, 2023 at 13:53

9 votes

1 answer

1k views

clang 14.0.0 floating point optimizations

asked Oct 7, 2022 at 9:28

9 votes

1 answer

350 views

Is it well-defined to use memset on a dynamic bool array?

asked Nov 6, 2018 at 12:21

8 votes

1 answer

381 views

_Bool type and strict aliasing

asked Sep 4, 2018 at 10:09

8 votes

3 answers

449 views

Inconsistent gcc diagnostic for string initialization

asked Jul 8, 2015 at 15:10

8 votes

3 answers

314 views

Non-conforming optimizations of volatile in gcc 11.1

asked Dec 16, 2021 at 14:16

7 votes

1 answer

318 views

What is clang trying to do optimizing this simple recursive algorithm?

asked Mar 20, 2020 at 12:10

7 votes

1 answer

435 views

Why are const qualified variables accepted as initializers on gcc?

asked Jul 5, 2021 at 8:00

7 votes

1 answer

201 views

Why doesn't gcc 13 display the correct binary represenation?

asked Oct 19, 2023 at 13:29

7 votes

3 answers

475 views

Reading an indeterminate value invokes UB? [duplicate]

asked Nov 14, 2016 at 8:58

7 votes

2 answers

169 views

Does giving data an effective type count as a side-effect?

asked Jun 25, 2018 at 8:37

7 votes

1 answer

1k views

Do pointers support "array style indexing"?

asked Apr 18, 2019 at 14:08

Collectives™ on Stack Overflow

60 Questions

Implicit type promotion rules

Redefining NULL

Correctly allocating multi-dimensional arrays

Crash or 'segmentation fault' when data is copied/scanned/read to an uninitialized pointer

How to create type safe enums?

Why is the maximum size of an array "too large"?

What's the meaning of "reserved for any use"?

Why isn't the keyword false an integer constant expression in gcc C23?

What is the meaning of "producing negative zeroes" in a system that doesn't support it?

Dynamic memory access only works inside function

realloc(ptr, 0) in C23 - now what?

Const correctness for array pointers?

Is this a valid way of checking if a variadic macro argument list is empty?

What is C11 cor 1:2012?

How should character arrays be used as strings?

"Pointer from integer/integer from pointer without a cast" issues

Why can I use gets() in gcc -std=c11?

Does nullptr_t break type punning or pointer conversions?

clang 15 miscompiles code accessing indeterminate values

clang 14.0.0 floating point optimizations

Is it well-defined to use memset on a dynamic bool array?

_Bool type and strict aliasing

Inconsistent gcc diagnostic for string initialization

Non-conforming optimizations of volatile in gcc 11.1

What is clang trying to do optimizing this simple recursive algorithm?

Why are const qualified variables accepted as initializers on gcc?

Why doesn't gcc 13 display the correct binary represenation?

Reading an indeterminate value invokes UB? [duplicate]

Does giving data an effective type count as a side-effect?

Do pointers support "array style indexing"?