حل lab1 مادة CS112 Object Oriented Programming جامعة الامير مقرن بن عبد العزيز

Please do the following exercises and submit python files during the lab time.

Create a different file for every code.

1. Student Marks Analyzer: Write a program that:

a. Asks the user to enter marks of 5 students (store in a list).

b. Print all marks. c. Print the highest and lowest mark.

d. Print the average mark (rounded to 2 decimals).

# Student Marks Analyzer

marks = []
for i in range(5):
    m = float(input(f"Enter mark of student {i+1}: "))
    marks.append(m)

print("All marks:", marks)
print("Highest mark:", max(marks))
print("Lowest mark:", min(marks))
print("Average mark:", round(sum(marks) / len(marks), 2))

2. Word Counter: Write a program that:

a. Asks the user to enter a sentence.

b. Count how many words are in the sentence.

c. Count how many times the letter "a" appears.

d. Print the sentence in uppercase.

# Word Counter

sentence = input("Enter a sentence: ")
words = sentence.split()
count_words = len(words)
count_a = sentence.lower().count("a")

print("Number of words:", count_words)
print("Number of 'a':", count_a)
print("Uppercase sentence:", sentence.upper())

3. Simple Shopping Cart: Write a program that:

a. Has a list of available items: ["apple", "banana", "milk", "bread"].

b. Asks the user to add 3 items to a shopping cart (input one at a time).

c. Store them in a new list.

d. Print the shopping cart.

e. Print how many "apple" were bought.

# Simple Shopping Cart

items = ["apple", "banana", "milk", "bread"]
cart = []

for i in range(3):
    item = input(f"Add item {i+1}: ").lower()
    if item in items:
        cart.append(item)
    else:
        print("Item not available")

print("Shopping cart:", cart)
print("Number of apples bought:", cart.count("apple"))

4. Number Statistics: Write a program that:

a. Asks the user to enter numbers until they type "stop".

b. Store the numbers in a list.

c. After stopping, print: i. All numbers entered ii. iii. iv. Sum of numbers Largest number Average of numbers

# Number Statistics

numbers = []

while True:
    value = input("Enter a number (or 'stop' to finish): ")
    if value.lower() == "stop":
        break
    numbers.append(float(value))

if numbers:
    print("All numbers:", numbers)
    print("Sum:", sum(numbers))
    print("Largest:", max(numbers))
    print("Average:", round(sum(numbers) / len(numbers), 2))
else:
    print("No numbers entered.")

5. Password Checker: Write a program that:

a. Asks the user to enter a password.

b. Password is valid if: i. At least 8 characters ii. iii. Contains "@" Print "Valid" if conditions are met, otherwise "Invalid".

# Password Checker

password = input("Enter password: ")

if len(password) >= 8 and "@" in password:
    print("Valid")
else:
    print("Invalid")

6. Multiplication Table Generator: Write a program that:

a. Asks the user for a number. Lab Manual CS112 Object Oriented Programming

b. Prints the multiplication table of that number up to 12.

c. Each line should look like "5 x 3 = 15".

# Multiplication Table Generator

n = int(input("Enter a number: "))

for i in range(1, 13):
    print(f"{n} x {i} = {n * i}")

7. Voting System: Write a program that:

a. Asks 5 students to vote for "Ali" or "Sara".

b. Store votes in a list.

c. Count votes for each candidate. d. Print the winner.

# Voting System

votes = []
for i in range(5):
    vote = input(f"Vote {i+1} (Ali/Sara): ").capitalize()
    if vote in ["Ali", "Sara"]:
        votes.append(vote)
    else:
        print("Invalid vote")

ali_count = votes.count("Ali")
sara_count = votes.count("Sara")

if ali_count > sara_count:
    print("Winner: Ali")
elif sara_count > ali_count:
    print("Winner: Sara")
else:
    print("It's a tie.")

8. Guessing Game: Write a program that:

a. Chooses a secret number between 1 and 10 (use random.randint).

b. User has 3 chances to guess it.

c. Print "Correct!" if guessed, or "Out of tries" if not.

# Guessing Game

import random

secret = random.randint(1, 10)
chances = 3

for i in range(chances):
    guess = int(input("Guess the number (1-10): "))
    if guess == secret:
        print("Correct!")
        break
else:
    print("Out of tries. The number was:", secret)

9. Favorite Fruits List: Write a program that:

a. Asks the user to enter 5 favorite fruits (store them in a list).

b. Print the list.

c. Print the fruits in reverse order. d. Print only the first 3 fruits.

# Favorite Fruits List

fruits = []
for i in range(5):
    fruit = input(f"Enter favorite fruit {i+1}: ")
    fruits.append(fruit)

print("All fruits:", fruits)
print("Reversed order:", list(reversed(fruits)))
print("First three fruits:", fruits[:3])

10. Student Directory with Lists: Write a program that:

a. Create two lists: one for names and one for IDs.

b. Ask the user to enter 3 names and their IDs, and store them in the two lists (same index = same student).

c. Ask the user to enter a name to search.

d. If found, print that student’s ID, otherwise print "Student not found".

# Student Directory with Lists

names = []
ids = []

for i in range(3):
    name = input(f"Enter student {i+1} name: ")
    student_id = input(f"Enter {name}'s ID: ")
    names.append(name)
    ids.append(student_id)

search = input("Enter a name to search: ")

if search in names:
    index = names.index(search)
    print(f"{search}'s ID is {ids[index]}")
else:
    print("Student not found")