The encryption problem is divided into three parts. the fourth part, solving dec

Question

The encryption problem is divided into three parts. the fourth part, solving decryption, is optional. To begin, set up your main program with the following: alpha = ' ' abcdefghijklmnopqrstuvwxyz ' ' offset = int (input (''Enter the offset: '')) phrase = input (''Enter the phrase to encrypt: '') Note that there is a space character at the end of the alphabet string so that you can include spaces in your phrases. 1. You will need to be able to find where a character occurs in the alphabet. Write a function called findpos (A, ch) that returns the position of character ch in string A. Positions start from 0 in the string. For example, if the alphabet A is as defined above and ch is "d", then the function returns 3. Call this from the main program to test that it works.

Explanation / Answer

def findPos(A, ch):
return A.find(ch)

alpha = "abcdefghijklmnopqrstuvwxyz "
offset = int(input("Enter an offset for substitution cipher: "))
phrase = input("Enter phrase to encrypt: ")

print("Position of d in " + alpha + " is " + str(findPos(alpha, 'd')))

# link for code https://goo.gl/5XkEfE

'''

Enter an offset for substitution cipher: 1   

Enter phrase to encrypt: test

Position of d in abcdefghijklmnopqrstuvwxyz  is 3   

'''

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