The following "cout" statement is used to a prompt statement asking the user to enter a whole number and "cin" input statement that will read the variable the_number (of type int) with a number typed in at the keyboard:

int the_number;
cout <<"Enter a whole number and press return: ";
cin >> the_number;

Complete executable program code:

#include <iostream>
using namespace std;

int main()
{ 
    //Declare the variable name, 'the_number'
    //along with the data type is int
    int the_number;

    //Prompt input statement as asking the user 
    //to enter a whole number.
    cout <<"Enter a whole number: ";

    //Read input from the user
    cin >> the_number;
    return 0;
}

Output of the program code:

Note: Only read the input value from the user by promptin of statement.

Enter a whole number: 500