while loop cpp

Question

Why does this code not work? What means the output? Thanks for every answer!

#include <iostream>
using namespace std;

int main() {
int x;
int i = 1;
while (i < 5) {
cin >> x;
cout << x+x;
i++;
}
}

Output after entering a number (for example 1) :
bash: 1: command not found

Answer 1

It works fine. Just like JaS said in sololearn you have to give all inputs at start. For example: when SL asks for input enter something like
1
2
3
4
And it should work fine.

Answer 2

This code works fine. Only in SL Playground you have to put all data input at its start.

Answer 3

It works for me.