Exer03_01_3.cpp

// Page 13, exercise 11
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int main()
{
    int i1, i2, upper, lower;
    cout << "Input two numbers separated by space:" << endl;
    cin >> i1 >> i2;
    if(i1 < i2)
    {
        lower = i1;
        upper = i2;
    }
    else
    {
        upper = i1;
        lower = i2;
    }
    // if you don't compare v1 and v2, result may be wrong.
    // while loop
    int iwhile = lower;
    while(iwhile <= upper)
    {
        cout << iwhile << endl;
        ++iwhile;
    }
    return 0;
}