It’s difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably … Read more
I have recently started to learn C and I am taking a class with C as the subject. I’m currently playing around with … Read more
Unsigned integer overflow is well defined by both the C and C++ standards. For example, the C99 standard (§6.2.5/9) states A computation involving … Read more
I was reading about order of evaluation violations, and they give an example that puzzles me. 1) If a side effect on a … Read more
I know the uninitialized local variable is undefined behaviour(UB), and also the value may have trap representations which may affect further operation, but … Read more
I know that an “undefined behaviour” in C++ can pretty much allow the compiler to do anything it wants. However, I had a … Read more
What is undefined behavior (UB) in C and C++? What about unspecified behavior and implementation-defined behavior? What is the difference between them? 9 … Read more
#include <stdio.h> int main(void) { int i = 0; i = i++ + ++i; printf(“%d\n”, i); // 3 i = 1; i = … Read more
When asking about common undefined behavior in C, people sometimes refer to the strict aliasing rule. What are they talking about? 1Best Answer … Read more
What are “sequence points”? What is the relation between undefined behaviour and sequence points? I often use funny and convoluted expressions like a[++i] … Read more