حل لاب2 مادة برمجة غرضية التوجه cs112

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

Create a different file for every code.

1. Circle Calculator: Ask the user to enter the radius of a circle.

a. Print the circumference.

b. Print the area (rounded to 2 decimals). � � Hint: Circumference = 2 × π × r, Area = π × r²

2. Simple Grade Checker: Ask the user for a mark (0–100).

a. If ≥ 90 → "Excellent"

b. If ≥ 70 → "Good"

c. If ≥ 50 → "Pass" d. Else → "Fail"

grade=int(input("enter your grade (0-100)"))
if grade>100 or grade<0:
    print("error")
elif grade>=90:
    print("grade excellent")
elif grade>=70:
        print("good")
elif grade>=50:
            print("pass")
else:
                print("fail")

3. Sum of Odd Numbers: Ask the user for a number N. Print the sum of all odd numbers from 1 to N.

num=int(input("enter a number"))
t=0
for number in range(0,num):
 if number %2!=0:
     t=t+number
print("t number is t")
print(t)*

4. Reverse Words: Ask the user for a sentence. Print each word reversed, but keep the word order. Example: "hello world" → "olleh dlrow"

sentence = input("Enter a sentence: ")
words = sentence.split()  # Split into words
reversed_words = [word[::-1] for word in words]  # Reverse each word
print(" ".join(reversed_words))  # Join back with spaces

5. Guess the Secret Number: Set a secret number =

a. Ask the user to keep guessing until correct. Print "Correct!" when guessed.

secret = "11"
guess = input("Guess the secret number : ")
attempts = 0
while guess != secret:
    print("Wrong! Try again.")
    guess = input("Guess again: ")
    attempts+=1
print(f"Correct! It took {attempts} attempts.")

6. Student List Manager: Create an empty list.

a. Ask the user to enter 5 student names.

b. Print the list.

c. Print the list sorted alphabetically.

students = []  
for i in range(5):
    name = input(f"Enter student {i+1} name: ")
    students.append(name)  
students.sort()
print("Student list:", students)

7. Multiples of a Number: Ask the user for a number. Print its multiples up to 50. Example: if n=7 → 7, 14, 21, 28, 35, 42, 49.

num = int(input("Enter a number: "))
multiples=num
while (multiples+7)<=50:
    multiples=multiples+num

print(f"Multiples of {num} up to 50: {multiples}")

8. Palindrome Word: Ask the user to enter a word. Check if it is a palindrome (reads the same forward and backward). Examples: level, madam, racecar, civic, rotor

word = input("Enter a word: ").lower().replace(" ", "")  
if word == word[::-1]:  # Compare with reverse
  print("It's a palindrome!")
else: print("Not a palindrome.")

9. Replace Vowels: Ask the user for a sentence. Replace all vowels (a, e, i, o, u) with "*".

sentence = input("Enter a sentence: ")
vowels = "aeiouAEIOU"
for v in vowels:
     sentence=sentence.replace(v,"*")
print("Vowels replaced (removed):", sentence)

10. Simple Calculator (Loop Version): Write a calculator that:

a. Asks for two numbers.

b. Asks for an operation (+, -, *, /).

c. Prints the result.

d. Repeats until the user types "exit".

while True:
  num1=int(input("enter number1: "))
  num2=int(input("enter number2: "))
  operation=input("enter operation: ")
  if operation=='+':
     result=num1+num2
  elif operation=='-':
     result=num1-num2
  elif operation=='*':
     result=num1*num2
  elif operation=='/':
    result=num1/num2
  elif operation=="exit":
    break
  else: result="invalid operation"
  print(result)