Can somebody explain it to me what’s wrong with the code?? TIC TAC TOE

Question

This is not my entire program as I found it on the internet but I made some changes .
I don’t know how to make it run smoothly without any errors.
I tried to figure it out but I need help.

https://code.sololearn.com/cFY4Pfka8LFe/?ref=app

Answer 1

if you are trying to run it here, it will not be playable.
because it is interactive, sololearn doesn't support that.
it compiles and sends results at once.
I didn't go through the code to see if there were any errors.
but if you are running it on your computer or any interactive terminal, then I will take a look at it :)

Answer 2

May you need to check conditions in check_for_win() properly again i think..

And at line no.79 in loop
for(int i=0;i<9;i++){
Use any other variable instead of i. Its already defined and setting to low value which cause infinite loop...