with open("notes.txt", "r", encoding="utf-8") as file:
    content = file.read()

print(content)

with open("notes.txt", "r", encoding="utf-8") as file:
    for line in file:
        print(line.strip())

with open("result.txt", "w", encoding="utf-8") as file:
    file.write("สรุปผลการประมวลผล\n")

try:
    number = int("abc")
except ValueError:
    print("แปลงค่าเป็นตัวเลขไม่ได้")

try:
    with open("missing.txt", "r", encoding="utf-8") as file:
        content = file.read()
except FileNotFoundError:
    print("ไม่พบไฟล์")

try:
    print(10 / 2)
except ZeroDivisionError:
    print("หารด้วยศูนย์ไม่ได้")
finally:
    print("จบการทำงาน")

try:
    with open("numbers.txt", "r", encoding="utf-8") as file:
        numbers = [int(line.strip()) for line in file]

    total = sum(numbers)

    with open("summary.txt", "w", encoding="utf-8") as file:
        file.write(f"total={total}\n")
except FileNotFoundError:
    print("ไม่พบไฟล์ numbers.txt")
except ValueError:
    print("ข้อมูลในไฟล์ต้องเป็นตัวเลข")