I'm programming in c++ and facing error " EOFError: EOF when reading a line" in online editors but code work's fine with idle what's the reason?

[Ahmad]

Hello everyone, I'd like to ask you a quick question for community members, i'm programming in c++ and facingâ  error " eoferror: eof when reading a line" in online editors but code work's fine with idle what's the reason? It is urgent, Thank you please kindly give me your opinion quickly.