Standard Input in C++

What exactly IS the "standard Input" for C++?

Is it cin? is it scanf? readline?

It's reading from your keyboard not from a file. Yes it's scanf, cin, gets, getchar, etc.

This is wrong -> cout << "enter number between 1 and 10000" << endl;

You must read and write exactly what is told in task statement, no less, no more.

Thank you!

I was adding an output before my input to prompt a potential user - now it's fixed!