Use the correct function to print the square root of x.
#include <iostream>
#include <@(5)>
using namespace std;
int main() {
  int x = 64;
  cout << @(4)(x);
  return 0;
}
#include <iostream>
#include <cmath>
using namespace std;
int main() {
  int x = 64;
  cout << sqrt(x);
  return 0;
}