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3. Übungen/07.04.2022/Getränke und Snack automat/Getränke_automat_2.py

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+# Getränke und Snackautomat
+# Uses database to store the products and the amount of money
+
+# Imports
+import sqlite3
+import os
+import sys
+import time
+import datetime
+
+# Make a new database
+conn = sqlite3.connect('Getränkeautomat.db')
+c = conn.cursor()
+# Create a table for the products
+c.execute("CREATE TABLE IF NOT EXISTS products (id INTEGER PRIMARY KEY, name TEXT, price REAL)")
+
+# Make an admin mode to add new products and change the price and add an id
+def admin_mode():
+    weiter_admin=True
+    while (weiter_admin==True):
+        # Print the admin menu
+        print("1. Add Product")
+        print("2. Change Price")
+        print("3. Delete Product")
+        # Ask for the user input
+        admin_input=input("Please choose an option: ")
+        # Check if the input is a number
+        try:
+            admin_input=int(admin_input)
+        except ValueError:
+            print("Please enter a number")
+            continue
+        # Check if the input is in the range of the admin menu
+        if (admin_input<1 or admin_input>4):
+            print("Please enter a number between 1 and 4")
+            continue
+        # Add a new product
+        # Ask for the product name
+        # Ask for the product price
+        # Ask for the product id
+        # Add the product to the database
+        if (admin_input==1):
+            product_name=input("Please enter the product name: ")
+            product_price=input("Please enter the product price: ")
+            product_id=input("Please enter the product id: ")
+            c.execute("INSERT INTO products (name, price, id) VALUES (?, ?, ?)", (product_name, float(product_price), int(product_id)))
+            conn.commit()
+            print("Product added")
+            continue
+        # Change the price of a product
+        # Ask for the product id
+        # Ask for the new price
+        # Change the price in the database
+        # Print the old price and the new price
+        if (admin_input==2):
+            product_id=input("Please enter the product id: ")
+            new_price=input("Please enter the new price: ")
+            c.execute("UPDATE products SET price=? WHERE id=?", (float(new_price), int(product_id)))
+            conn.commit()
+            print("Old price: " + str(c.execute("SELECT price FROM products WHERE id=?", (int(product_id),)).fetchone()[0]))
+            print("New price: " + str(new_price))
+            continue
+        # Delete a product
+        # Ask for the product id
+        # Delete the product from the database
+        if (admin_input==3):
+            product_id=input("Please enter the product id: ")
+            c.execute("DELETE FROM products WHERE id=?", (int(product_id),))
+            conn.commit()
+            print("Product deleted")
+            continue
+        # Ask if the user wants to continue in the admin mode
+        if (admin_input==4):
+            weiter_admin=False
+            normal_mode()
+
+# Make the normal operation mode
+def normal_mode():
+    print("Willkommen beim Getränke und Snackautomat")
+    print("Drücken Sie 1 um zu starten")
+    print("Drücken 2 um zum Adminmodus zu wechseln")
+    print("Drücken 3 um das Programm zu beenden")
+    # Ask for the user input
+    user_input=input("Please choose an option: ")
+    # Check if the input is a number
+    try:
+        user_input=int(user_input)
+    except ValueError:
+        print("Bitte geben Sie eine Nummer ein")
+        return
+    # Check if the input is in the range of the admin menu
+    if user_input==2:
+        # Ask for the admin password
+        admin_password=input("Please enter the admin password: ")
+        # Check if the password is correct
+        if (admin_password=="admin"):
+            # Start the admin mode
+            admin_mode()
+            return
+        else:
+            print("Wrong password")
+            return
+    if user_input==3:
+        # Exit the program
+        sys.exit()
+    if user_input==1:
+        sum_of_price=0
+        normal_continue=True
+        while (normal_continue==True):
+            # Print all the products and their price and the id of the product
+            for row in c.execute("SELECT * FROM products"):
+                print(row)
+            # Ask for the product id
+            product_id=input("Bitte Nummer des gewünschten Produktes eingeben: ")
+            # Check if the product id is in the database
+            if (c.execute("SELECT * FROM products WHERE id=?", (int(product_id),)).fetchone()==None):
+                print("Product nicht gefunden")
+                return
+            # Get the price of the product
+            product_price=c.execute("SELECT price FROM products WHERE id=?", (int(product_id),)).fetchone()[0]
+            # Ask the amount of the product
+            product_amount=int(input("Bitte Anzahl des Produktes Eingeben: "))
+            sum_of_price=product_price*product_amount
+            # Print the price of the sum
+            print("Summe:%s€" % sum_of_price)
+            # Ask if the user wants to continue
+            if (input("Weiter Einkaufen? (j/n): ")=="n"):
+                normal_continue=False
+                payment(sum_of_price)
+                return
+# Define a function to handle the payment
+def payment(sum_of_price):
+    # Print the price of the sum
+    print("Summe: %s€" % sum_of_price)
+    # Ask for the money put in the machine
+    money_in_machine=input("Bitte Geld eingeben: ")
+    # Check if the money is a number
+    try:
+        money_in_machine=int(money_in_machine)
+    except ValueError:
+        print("Bitte geben Sie eine Nummer ein")
+        return
+    # Check if the money is enough
+    if (money_in_machine<sum_of_price):
+        print("Zu wenig Geld")
+        return
+    # Print the change
+    print("Rückgeld: %s€" % (money_in_machine-sum_of_price))
+    # Stückelung
+    rest_euro=money_in_machine-sum_of_price
+    rest_cent=rest_euro*100
+
+    # 10 Euro
+    rest_euro_10=rest_cent//10000
+    rest_cent=rest_cent-rest_euro_10*10000
+    
+    # 5 Euro
+    rest_euro_5=rest_cent//5000
+    rest_cent=rest_cent-rest_euro_5*5000
+
+    # 2 Euro
+    rest_euro_2=rest_cent//2000
+    rest_cent=rest_cent-rest_euro_2*2000
+
+    # 1 Euro
+    rest_euro_1=rest_cent//1000
+    rest_cent=rest_cent-rest_euro_1*1000
+
+    # 50 Cent
+    rest_cent_50=rest_cent//500
+    rest_cent=rest_cent-rest_cent_50*500
+
+    # 20 Cent
+    rest_cent_20=rest_cent//200
+    rest_cent=rest_cent-rest_cent_20*200
+
+    # 10 Cent
+    rest_cent_10=rest_cent//100
+    rest_cent=rest_cent-rest_cent_10*100
+
+    # 5 Cent
+    rest_cent_5=rest_cent//50
+    rest_cent=rest_cent-rest_cent_5*50
+    
+    print ("10 Euro: %s" % rest_euro_10)
+    print ("5 Euro: %s" % rest_euro_5)
+    print ("2 Euro: %s" % rest_euro_2)
+    print ("1 Euro: %s" % rest_euro_1)
+    print ("50 Cent: %s" % rest_cent_50)
+    print ("20 Cent: %s" % rest_cent_20)
+    print ("10 Cent: %s" % rest_cent_10)
+    print ("5 Cent: %s" % rest_cent_5)
+    
+normal_mode()
+