How to use a menu

   #include <iostream>
using namespace std;

int main()
{
    int food, product, total;
    double price;
    cout << "     Welcome To Maggie’s Shopping Cart Calculator!" << endl;
    char option; // user's entered option will be saved in this variable
    do{
    //Displaying Options for the menu
    cout << " 1) Please add an item to your cart " << endl;
    cout << " 2) Final Total Amount" << endl;
    cout << " 3) Quit the program" << endl;   //Prompting user to enter an option according to menu
    cout << " Please select an option : ";
    cin >> option;  // users option
    total = price;
    if (option == 1) // Checking if user selected option 1
    {
        cout << " Please enter item and the price : " << endl;
        cin >> food;
        cin >> price;
        cout << " Total amount so far: " << price << endl;
        }
        else if (option == 2)
            cout << "Total Amount so Far: " <<  total << endl;
        else if (option == 3) // Checking if user selected option 2
        {
            cout << " End Shopping Cart! " << endl;
    }
    }
        while (option != 3);
        system("pause");
        return 0;
    }

This is my code that I have, I just continues to repeat the menu, even when I select an option help! The assignment is to have three options for the user to choose, and the menu should be repeated after choice 1 was selected. My code isn't letting me enter in any information.