C++ program : decide if a number is positive,Negative or zero

This program written in C++, asks the user to enter a number , then it will decide if the number is positive , negative or zero.

The Code : 

#include <iostream>

using namespace std;

void main()

{

signed int x;

cout << "Enter an integer ";

cin >> x;

cout << endl;

if (x == 0)

cout << " Zero Number " << endl;

else if (x < 0)

cout << "Negative Number" << endl;

else if (x > 0)

cout << "Positive Number " << endl;

system("pause");

}