Questions tagged [vigenere.c]

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CS50 Vigenere code gives incorrect when detecting a non-alphabet char for plaintext

My vigenere code works fine when a single char or string is entered, however as soon as it detects a space in plaintext it gives wonky values. Please help! #include <cs50.h> #include <stdio....
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Having problem with vigenere in cs50. Keeps returning segmentation error, even though I solved all the errors compiler pointed out

#include <cs50.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <ctype.h> char argument_upper (int key, char plaintext); char argument_lower (int ...
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In pset2, Vigenere, I made and used an array that I would like for it to be explained

I’ve successfully solved Caesar and Vigenere pset but made and used an array that I stumbled upon through trial and error but don’t exactly know why and how it worked. I’m hoping someone could clarify ...
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I have multiple issues with my code

after rewriting my code again i faced some proplems, when i compile it with 'a' or other key it's not printing anything, and i'm checking if user not providing plaintext it should print messege but it ...
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what's wrong here? i get an segmentation fault error and am i at the right direction?

int keyvalue = 0; int n = strlen(argv[1]); char cipher; for (int i = 0; i < n; i++) { keyvalue++; } for (int i = 0, s = strlen(...
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Vigenère spitting out random strings

My vigenère is spitting out random strings. For example, here is a test I got from my terminal ~/pset2/ $ ./vigenere a plaintext: a ciphertext: G ~/pset2/ $ And my code is here. I suspect that ...
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443 views

CS50 pset2 vigenere problem getting the shift

Problem with the shift value function ## Hi, Could anyone please take a look at the code below and help me figure out where it goes wrong. I think the problem is with the shift_value. The code ...
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1 answer
152 views

vigenere pset2 spaces

I'm having issues figuring out how to ignore the spaces in the user string when changing to ciphertext. I thought the isalpha() check accounted for that but I guess not. Any help would be ...
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1 answer
51 views

Vigenere Cipher Printing Problem

I am wondering what this code is doing wrong when I run the keyword, "illuminatti," and the plaintext, "Magick is the key". I should get the ciphertext, "Ulrcos vs mam spj". I instead get the ...
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1 answer
59 views

Problem about vigenere.c

https://pastebin.com/Quzkj9FT I have finished the first case : both plaintext and key are isupper.(The Link) However, I got some problems when doing either one of them is islower. Can anyone give me ...
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Vigenere.c has some problem in accepting alpabetic as a key

when i give an input of ./vigenere abc it doesn't accept and its printing key must be alphabetic.where have i gone wrong.would anyone explain in brief? and how do i correct it? Please help me out.! ...
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not satisfying the condition for input

In command line argument,it should not accept argv[1] as a numeric or any other.It should accept only alphabetic and that argv[1] is treated as key which is to be added with plaintext.so,for that i ...
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Pset3 help : vigenere error

I have this error. Please Help ~/workspace/pset2/ $ make vigenere clang -fsanitize=signed-integer-overflow -fsanitize=undefined -ggdb3 -O0 -std=c11 -Wall -Werror -Wextra -Wno-sign-compare -Wshadow ...
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1 answer
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Vigenere unexpected output after length of key

I feel like I'm pretty close with this one, but I can't find where the wraparound is messing up. Any idea where I'm going wrong? Expected: $ ./vigenere ABC plaintext: HELLO ciphertext: HFNLP Actual:...
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1 answer
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Vigenere can't get correct output from key

I'm working on at least getting the key to apply the first go-around, then I will worry about how to wrap around the key. I'm outputting integers in the alphabetical index to keep it simpler. Here is ...
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1 answer
774 views

vigenere and space character

Pls help me. My code: https://gist.github.com/morozded/774d9d3c4575efee661d6b21290b0b97 Result my code: ~/workspace/pset2/vegnere/ $ ./vigenere bacon plaintext: Meet me at the park at eleven am ...
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1 answer
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vigenere.c done incorrectly, or check50 broken? [duplicate]

I completed vigenere.c per the spec for pset2, and it seems to be working fine. However, when I use check50, this is the result I get. So it says everything is fine, however when it checks how the ...
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Vigenere - is there a simpler logic behind it?

My code for vigenere.c works for check50, but ends up being much longer than caesar.c in the encipher part.I was wondering if I was missing a simple point and have meandered through the logic behind ...
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1 answer
303 views

Pset2 Vigenere very close but errors on Check50

this was very useful last time when I was struggling with an unseen error. I'm just after a nudge in the right direction again, My code compiles and passes most of the check50 tests bar a few, the ...
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1 answer
80 views

Please correct my mistakes in my vigenere code

Here's my code. I get lot's of errors from the compiler. Can you simply fix explicit errors that I made? So that I am on the right track and then I can keep fixing. #include <cs50.h> #include &...
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vigenere.c unknown problem / am I an idiot?

Right gentlemen. I've been really bad doing vigenere.c, doing it for 3 days in a row, I've finally made it and it passes check50 tests, but! I've 2 almost the same codes, one which should work, but it ...
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1 answer
25 views

Pset2 - Receiving different outputs each time I run my code- Vigenere.c

I'm working on Vigenere.c, and while my code seems to be mostly correct, I keep having very strange outputs which are not even the same every time I run the program (e.g. If I run my code one time ...
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1 answer
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pset2 vigenere.c question.. everythint passes except BaRFoo to BaZ

This is my first time posting on here so bare with me. Having a little trouble with pset2 vigenere.c. I've been looking through the forums looking at all the questions pertaining to my question, but ...
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1 answer
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Trouble with pset2 vigenere

Can't figure out what I am doing wrong here. I am guessing it has to do with the way I am incrementing through the keyword. Sample below: firecore@ide50:~/workspace/pset2 $ ./vigenere abcdefghijk &...
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1 answer
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Pset2 vigenere key verification problems

Hey to check that the user is entering just alpha I have it set as: If (!isalpha(argv[1])) && (argc != 2) { Yell at user } The argc check works fine on its own. The isalpha check returns a ...
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2 answers
66 views

Vigenere compiles but doesn't ask for input?

I'm really struggling with this pset. I know my code isn't 100% right yet but I compiled it to test it out and it eventually compiled without errors. But the problem I'm having is that it's testing ...
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1 answer
133 views

Pset2 Vigenere Cipher error

I'm solving the Vigenere Cipher of Pset2, but when I compile the program, it shows an error: format specifies type 'int' but the argument has type 'unsigned long' [-Werror,-Wformat] I am not sure ...
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1 answer
33 views

bad access error or segmentation fault on Vigenere

I am following along the cs50 course using Xcode and I have vigenere almost working except it only lets me input 28 characters for the message, beyond that I get "exc bad access" error in Xcode or ...
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Problem Set 2: Vigenere's Cipher

I implemented the check50 to check the correctness of my vigenere's cipher program and received the following prompt: :( rejects "Hax0r2" as keyword \ expected output, not a prompt for input What ...
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pset2. need help on vigenere.c code

Help me please with a problem on coding vigenere.c. The problem is with figuring out the correct code for using the key-formula on the plaintext. I think that i've found out the correct formula for ...
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1 answer
108 views

Why is my Vigenere cypher not processing my keyword correctly?

I have included the part of my cypher responsilble for converting a command line keyword into an array of integers that will indicate by how much each character in a phrase should be shifted in ...
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2 answers
96 views

Vigenere code has Segmentation error

I've been working on the vigenere.c problem from pset2 and am struggling to find the error in my code currently because whenever I try to run it my code crashes. Clearly there is something wrong but I ...