I'm learning while loops and I'm having trouble with this program I'm writing. The user inputs 2 numbers and I have to be able to display different things, like the odd numbers between the numbers entered. This is what I have so far. If someone could steer me in the right direction, I'd really appreciate it.

Code:
#include <iostream>

using namespace std;

int main()
{
	int firstNum;
	int secondNum;

	cout << "Enter two numbers." << endl;
	cout << "First number must be less than or equal "
		 << "to the second number you enter" << endl;
	cout << "Enter numbers: ";
	cin >> firstNum >> secondNum;
	cout << endl;

	while (firstNum <= secondNum)
	{
		cout << "Odd integers between " << firstNum << " and " 
			 << secondNum << "are: ";