IT Nursery
It’s difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For...
I have recently started to learn C and I am taking a class with C as the subject. I’m currently playing around with loops and I’m running into some...
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 unsigned operands can never overflow, because...
I was reading about order of evaluation violations, and they give an example that puzzles me. 1) If a side effect on a scalar object is un-sequenced relative to...
I know the uninitialized local variable is undefined behaviour(UB), and also the value may have trap representations which may affect further operation, but sometimes I want to use the...
I know that an “undefined behaviour” in C++ can pretty much allow the compiler to do anything it wants. However, I had a crash that surprised me, as I...
What is undefined behavior (UB) in C and C++? What about unspecified behavior and implementation-defined behavior? What is the difference between them? 9 s 9 Undefined behavior is one...
#include <stdio.h> int main(void) { int i = 0; i = i++ + ++i; printf("%d\n", i); // 3 i = 1; i = (i++); printf("%d\n", i); // 2 Should...
When asking about common undefined behavior in C, people sometimes refer to the strict aliasing rule. What are they talking about? 1Best Answer 11 A typical situation where you...
What are “sequence points”? What is the relation between undefined behaviour and sequence points? I often use funny and convoluted expressions like a[++i] = i;, to make myself feel...