version with previous to while price reading

31.mercadona.cpp

// 31.mercadona.cpp
// juanfc 2025-09-29
// version with previous to while price reading
// https://gist.github.com/juanfal/0ad059d9c81aac52b22d836f949ad3bf

#include <iostream>
using namespace std;

int main()
{
    float s = 0;    // important initialization
    int cnt = 0;    // important initialization

    cout << "New customer, enter prices (0 ends)" << endl;
    float price;    // do not initialise it
    cin >> price;   // the user will do it for you

    float minPrice = price, maxPrice = price;

    while (price != 0) {
        if (price > maxPrice) {
            maxPrice = price;
        } else if (price < minPrice) {
            minPrice = price;
        }

        s += price;
        ++cnt;
        cin >> price;
    }

    if (cnt > 0) {
        cout << "Total: " << s << endl;
        cout << "Max price: " << maxPrice << endl;
        cout << "Min price: " << minPrice << endl;
        cout << "Avg price: " << s / cnt << endl;
    }

    return 0;
}