Exercise 06-05:
Modify the example to search for two values. Instead of just p, read another value v that will also be searched. In the printout, indicate which of the two values was found first.
Answer:
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# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 06/exercise-06-05.py.py
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last = 10
queue = list(range(1, last + 1))
while True:
print(f"\nThere are {len(queue)} customers in the queue")
print("Current queue:", queue)
print("Enter F to add a customer to the end of the queue,")
print("or A to serve a customer. S to exit.")
operation = input("Operation (F, A or S):")
x = 0
exit = False
while x < len(operation):
if operation[x] == "A":
if len(queue) > 0:
served = queue.pop(0)
print(f"Customer {served} served")
else:
print("Empty queue! No one to serve.")
elif operation[x] == "F":
last += 1 # Increments the new customer's ticket
queue.append(last)
elif operation[x] == "S":
exit = True
break
else:
print(
f"Invalid operation: {operation[x]} at position {x}! Enter only F, A or S!"
)
x = x + 1
if exit:
break