C++ :: Creating Menu Program Using Only If And While For En Do Loops

I just started learning the basics of programming. While encountering one of the practice problems in the book by Alex Allain I got a little confused. The question is as follows:

Write a menu program that lets the user select from a list of options, and if the input is not one of the options, reprint the list.

The author assumes you can answer this question only using if statements and/or loops (while, for and do).

This is the code I've written thus far:

Code: #include <iostream>
using namespace std;
int main()
{
int option;
char reset;

[Code] ....

For some reason, the nested while loop keeps repeating even when you input a valid option (1, 2 or 3). I can't seem to figure out why this happens.