Algoritmlarni loyihalashtirish va tahlil qilish

Ishni bajarilish tartibi va qo‘yilgan vazifa:
Asosiy matn shifrlash usullaridan birida shifrlansin va qadamma – qadam izohlansin. Shuningdek S++ yoki Piton dasturlash tizimida dasturiy ta’minot yaratilsin.
Hisobot mazmuni:
Ish mavzusi.
Ishdan maqsad.
Shifrlash algoritmini blok-sxemasi.

Dastur matni.

1-topshiriq
1. Masalaning berilishi. Sezar usulida shifrlash va deshifrlash
2. Dastur kodi.
import string
print("KALITNI KIRITING: ")
kalit = input()
print("SHIFRLANUVCHI MATNNI KIRITING: ")
matn = input()
shift = int(kalit)
text = matn.upper()
encryption = ""
for c in text:
if c.isupper():
c_code = ord(c)

c_index = ord(c) - ord("A")

new_index = (c_index + shift) % 26
new_unicode = new_index + ord("A")

new_character = chr(new_unicode)

encryption = encryption + new_character

else:
encryption += c

shift1=shift
plain_text1=""
for c1 in encryption:
if c1.isupper():
c1_unicode = ord(c1)
c1_index = ord(c1) - ord("A")
new1_index = (c1_index - shift1) % 26
new1_unicode = new1_index + ord("A")
new1_character = chr(new1_unicode)
plain_text1 = plain_text1 + new1_character
else:
plain_text1 += c1
print("Kiritilgan text:",text)
print("Shifrlash uchun 1 ni bosing: ")
k=input()
b=int(k)
if b==1:
print("Shifrlangan text:",encryption)
print("Deshifrlash uchun 1 ni bosing: ")
z=input()
l=int(z)
if l==1:
print("Deshifrlangan text:",plain_text1)
else:
print("Shifrlangan text:",encryption)
else:
print("Kiritilgan text:",text)


2. Natija.
Sezar usuli bo’yicha Shifrlash natijasi