why it make dead circle when i input other characters to "n"?

Question

i make a code input different data into a file but i make dead circlr if i input "a " at first
https://code.sololearn.com/c7sBQz5SH234/?ref=app

Answer 1

cin>>n doesn't set n if there isn't a number typed. Try validating number like I did in here
https://code.sololearn.com/cF7iOkU73BYy/?ref=app

Answer 2

thanks a lot