Lundin

Specialist at C programming for embedded systems, with 10+ years of experience in designing safety-critical real-time systems (industrial/automotive), a total of 20+ years of programming experience and a degree in computer engineering.

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Implicit type promotion rules

c type-conversion implicit-conversion asked Sep 6, 2017 at 10:50

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121 votes

Redefining NULL

c null asked Feb 28, 2011 at 12:53

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104 votes

Correctly allocating multi-dimensional arrays

c arrays dynamic-arrays dynamic-allocation variable-length-array asked Feb 7, 2017 at 16:02

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68 votes

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

c pointers segmentation-fault asked May 31, 2016 at 15:17

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60 votes

How to create type safe enums?

c enums type-safety asked Mar 27, 2017 at 9:54

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59 votes

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

c gcc mingw size-t stdint asked Mar 3, 2017 at 9:17

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55 votes

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

c++ c language-lawyer c-standard-library asked Sep 17, 2018 at 12:13

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36 votes

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

c gcc language-lawyer null-pointer c23 asked Feb 6 at 14:11

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21 votes

Dynamic memory access only works inside function

c malloc parameter-passing dynamic-memory-allocation pass-by-value asked Sep 14, 2016 at 9:20

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20 votes

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

c language-lawyer bitwise-operators signed twos-complement asked Mar 7, 2019 at 12:55

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Top Answers

413

This C function should always return false, but it doesn’t

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367

Why is 0 < -0x80000000?

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301

What is the difference between C, C99, ANSI C and GNU C?

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201

Implicit type promotion rules

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161

What is the benefit of terminating if … else if constructs with an else clause?

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153

Initializing entire 2D array with one value

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147

Correctly allocating multi-dimensional arrays

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123

Endless loop in C/C++

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119

Why is the .bss segment required?

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117

"int *nums = {5, 2, 1, 4}" causes a segmentation fault

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116

Should I cast the result of malloc (in C)?

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111

What happens if I define a 0-size array in C/C++?

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100

Why bit endianness is an issue in bitfields?

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Why is a segmentation fault not recoverable?

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Did the author make a mistake in explaining stack and heap in C++ or am I misreading something?

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How do I make an infinite empty loop that won’t be optimized away?

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Left shifting with a negative shift count

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Reasons to use (or not) stdint

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Type conversion - unsigned to signed int/char

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Why is assigning a value to a bit field not giving the same value back?

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In a GNU C macro envSet(name), what does (void) "" name mean?

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What does 'u' mean after a number?

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Can I hint the optimizer by giving the range of an integer?

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Pass an array to a function by value

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Explain this implementation of malloc from the K&R book

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Freaky way of allocating two-dimensional array?

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In C, why do some people cast the pointer before freeing it?

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How to create type safe enums?

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C header issue: #include and "undefined reference"

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