How to fix the next error?

Question

Separate multiple entries through separate lines

Answer 1

it is web based so got to give it a break. All inputs must be given at runtime for a c++ program on code playground.

if your program is

cout <<"enter two numbers"
cin >> a
cin >> b
cout << a+b;

you would need to enter two lines with a number on each say 1 and 2 like this

1
2

Answer 2

I assume you mean in sololearn?

Answer 3

My program does not start, when i write (cin>>a; cin>>b;) or (cout<<"Hello! Write number\n"; cin>>a;)

Answer 4

Yes, in sololearn

Answer 5

Jason, thank you! Everything became clear to me