54182023-05-17 09:27:47TortelliniJrTáblajátékcpp17Compilation error

#include <iostream>
#include <vector>
#include <array>
using namespace std;
int main()
{
    int n, s, o, j;
    cin >> n;
	for (int i = 0; i < n; i++)
	{
		cin >> j;
		switch (j)
		{
		case 0:
			s++;
			o *= 2, o--;
			break;
		case 1:
			s++, o *= 2;
			break;
		case 2:
			s--;
			o = ceil(o / 2);
		case 3:
			o--;
		case 4:
			o++;
		}
	}
	cout << s << endl;
	cout << o << endl;
}
Compilation error
exit status 1
main.cpp: In function 'int main()':
main.cpp:24:29: error: 'ceil' was not declared in this scope
   24 |                         o = ceil(o / 2);
      |                             ^~~~
Exited with error status 1