How to take user input for char array that is a member of struct ? [Solved]

Question

Uncomment those 3 lines in the following code and it works fine , and i have no idea about what is happening , so if anyone can explain ? Ty!

https://code.sololearn.com/cYiSLulJj2M9/?ref=app

Answer 1

I think it's the .
#define Q X.m
cin.getline(Q,20);

works too without the dummy.

Answer 2

This is a known SoloLearn issue. Not all input functions also trigger the input box, and some only do so with a specific syntax (for example, std::getline() requires no spaces between the parentheses and the arguments in order to trigger the input).
If necessary, a common workaround is to place a macro like the following somewhere in your code:

#define dummy std::cin >>

Answer 3

I dunno, I guess Sololearn just takes your code and parses it to check if there is a cin or getline somewhere but it has problems if some characters get involved, probably.

Answer 4

Shadow thank you .

Answer 5

Shadow but char array defined in main function works fine without that macro , why so!

Answer 6

Sorry, I don't know the reason for this behaviour either. My knowledge about how SoloLearn's IDE works under the hood is very limited.

Answer 7

Dennis why does that work ? And why it don't without it!