Answer:
Following is the program in C++ Language 
#include <iostream> // header file
using namespace std; // namespace std
int main() // main method
{
    int n;  // variable declaration
    cout<<" Please enter the number :";
    cin>>n; // Read the number
    if(n>0) // check the condition when number is positive
    {
cout<<n<<endl<<"The number is Positive"; // Display number 
    }
   else if(n<0) // check the condition when number is Negative
   {
cout<<n<<endl<<"The number is Negative";// Display number
   }
   else // check the condition when number is Zero
   {
cout<<n<<endl<<"The number is Zero";// Display number
   }
    return 0;
   }
Output:
Please enter the number:
64
The number is Positive
Explanation:
Following are the description of the program 
- Declared a variable "n" of int type.
- Read the value of "n" by user.
- Check the condition of positive number by using if block statement .If n>0 it print the number is positive.
- Check the condition of negative number by using else if block statement If n<0 it print the number is negative.
- Finally if both the above condition is fail it print the message " The number is Zero"