C++ Round Half Up

Simple C++ program to round given number half up.

#include <iostream>
#include <cmath>

using namespace std;

// 2018 TheFlyingKeyboard and released under MIT License
// theflyingkeyboard.net
double roundHalfUp(double x, int n);

int main() {
  double x = 0;
  int n = 0;

  cout << "Enter x: ";
  cin >> x;


  cout << "Enter n: ";
  cin >> n;

  cout << "roundHalfUp(" << x << ", " << n << ") is equal to " << roundHalfUp(x, n);

  int a;
  cin >> a;

  return 0;
}

double roundHalfUp(double x, int n) {
  return floor(pow(10, n) * x + 0.5f) / pow(10, n);
}

IN
23.54 1
23.55 1
OUT
23.5
23.6