CSC110 - Cryptography And ASCII Characters - Computer Science Assignment Help

Assignment Task

1. Write a function called ord0() that takes as input one of the 95 printable ASCII characters, and returns a number between 0 and 94 associated with the order of the 95 printable characters. You can call the ord() function in this function. You should get the following output from this function:

2. Write a function called chr0() that takes as input one a number from 0 to 94 and returns the character in that position among the 95 printable characters. This function can call the chr() function. You should get the following output from this function:

3. Write a function called caesar95() that computes a Caesar cipher where the input is a string containing a combination of any of the 95 printable characters, and a shift value. The function should return the cipher text with the characters shifted by the specified amount. You can use the Caesar cipher function that we wrote in class as a starting point. You can find it on the Sample Code page. Note, you will not need to use the list of letters in the alphabet. Instead, you will use the functions that you wrote above to convert from a letter to its corresponding number.

4. Write a main function that asks the user to enter a string and a shift value and then prints the cipher text computed by the Caesar function. Your main function should loop and print results until the user enters the string “Done”. Be sure to use exception handling to ensure that a valid integer is entered for the shift value.

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