Speak now
Please Wait Image Converting Into Text...
Embark on a journey of knowledge! Take the quiz and earn valuable credits.
Challenge yourself and boost your learning! Start the quiz now to earn credits.
Unlock your potential! Begin the quiz, answer questions, and accumulate credits along the way.
General Tech Bugs & Fixes . 2 years ago
Posted on 16 Aug 2022, this text provides information on Bugs & Fixes related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
Turn Your Knowledge into Earnings.
Answers (2)
This question already has an answer here:
I came across this block of code when studying for my class. It was in my professor's presentation and I thought it was an error, so out of pure curiosity, I tried to compile it. To my surprise, it's actually a valid code. I tried looking it up online but couldn't find a clear answer as to why exactly does it work.
int n, num; scanf("%d", &n); vector<int> arr; arr.reserve(n); while (n--) scanf("%d", &num), arr.push_back(num); for (int i : arr) printf("%d ", i); printf("\n");
I expected the while-loop to cause a compilation error, but it runs smoothly. Is it standard or was that introduced recently?
This is the comma operator at work. It evaluates the left hand side of the operator (scanf("%d", &num)), then the right hand side (arr.push_back(num)) and returns the result of this expression.
scanf("%d", &num)
arr.push_back(num)
I don't think the code snippet is a good usage scenario for the comma operator. It seems to be employed for not typing {} to create a body for the while loop, which is lazy and unnecessarily "smart". But it works.
{}
while
If you're interested in legitimate use cases for the comma operator, have a look at this article.
No matter what stage you're at in your education or career, TuteeHub will help you reach the next level that you're aiming for. Simply,Choose a subject/topic and get started in self-paced practice sessions to improve your knowledge and scores.
General Tech 9 Answers
General Tech 7 Answers
General Tech 3 Answers
General Tech 2 Answers
Banking, Finance & Insurance
Mobile Technologies
Career Talk
General Tech
Commerce & Accounting
Career Talk0 Answers
General Tech0 Answers
Digital Marketing0 Answers
Internet of Things0 Answers
Interview Questions0 Answers
Ready to take your education and career to the next level? Register today and join our growing community of learners and professionals.