C++ Round Away From Zero

Simple C++ program to round given number away from zero.

#include <iostream>
#include <cmath>

using namespace std;

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

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

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


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

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

  int a;
  cin >> a;

  return 0;
}

double roundAwayFromZero(double x, int n) {
  return x > 0 ? ceil(pow(10, n) * x) / pow(10, n) : floor(pow(10, n) * x) / pow(10, n);
}

IN
3.1425 2
-3.1425 2
OUT
3.15
-3.15