Write a program in C++ to check whether a given number is a perfect cube or not

#include<iostream>
#include<math.h>
using namespace std;
int main() 
{ 
int num, curoot,ans; 

 cout << "\n\n Check whether a number is a perfect cube or not: \n";
 cout << " -----------------------------------------------------\n";
    cout<<" Input a number: ";
    cin>>num;
curoot=round(pow(num, 1.0/3.0));

if(curoot*curoot*curoot==num)
{
  cout<<" The number is a perfect Cube of "<<curoot<<endl;   
}
else
{
  cout<<" The number is not a perfect Cube."<<endl;   
}
}