C++ Math ceil()

ceil(8.1)=9.0;
ceil(-8.8)=-8.0;

double ceil(double x);

#include <iostream>
#include<cmath>
using namespace std;
int main()
{
  float x=9.2;
  std::cout << "Initial value of x is :"<<x;
  cout<<'\n';
  cout<<"final value of x is :"<<ceil(x);
  return 0;
}

Initial value of x is :9.2
final value of x is :10   

#include <iostream>
#include<cmath>
using namespace std;
int main()
{
  float x=-2.2;
  std::cout << "Initial value of x is :"<<x;
  cout<<'\n';
  cout<<"final value of x is :"<<ceil(x);
  return 0;
}

Initial value of x is :-2.2
final value of x is :-2