Questions tagged [pset2]
The problem set for Week 2 continues with the C programming language used in problem set 1.
1,247
questions
0
votes
1answer
15 views
Why is it asking me to declare (s) when is has been declared already?
#include <stdio.h>
#include <cs50.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
bool is_valid_key(string s);
int main(int argc, string argv[])
{
if (...
0
votes
1answer
26 views
Question on pset2 caesar - segmentation
I am really stuck on pset2 Caesar. I can compile it, but when I try to enter valid command line argument, it keeps on saying that I have a Segmentation fault. That seems to mean that I access memory ...
0
votes
0answers
10 views
Readability Pset2 - check50 multiple test fail
This is the code for readability problem set 2. The code is working but not properly as it's failing test cases. the output grade is either +-1 from the expected result.
Is there something wrong while ...
0
votes
2answers
21 views
Caeser Pset2: Segmentation Fault
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#include <cs50.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
if ((int)...
0
votes
1answer
9 views
PSET2 Substitution: Trouble only in encrypts all alphabetic characters using DWUSXNPQKEGCZFJBTLYROHIAVM as key
so this is my code. All problems are compiled successfully except this one. The output is "Segmentation fault"
this is my code:
#include <stdio.h>
#include <cs50.h>
#include <...
0
votes
1answer
21 views
Pset 2 (Substitution), time out (handling of incorrect chars)
The below code lost a mark; check50 gave the explanation just below. A different time-out query (by Abhijit) appears to have had a different cause.
The check50 line used: check50 cs50/problems/2021/x/...
0
votes
0answers
10 views
error: address of stack memory associated with local variable
I have the following function:
string encipher( string plaintext, string key)
{
int size = strlen(plaintext);
char ciphertext[size];
// For each alphabetic charaters determine what letter ...
0
votes
1answer
17 views
Pset 2 Substitution Segmentation Fault
I'm currently running into a segmentation fault when I don't put a key in the command line. I'm trying to say that if argc = 1 then "Please type key in command-line." but instead I'm getting ...
0
votes
1answer
37 views
CS50 pset2 substitution - timed out while waiting for program to exit
I tried all the provided examples on the pset2 site, and I got all of them correct. But when I used check50 to check my code, it said: "timed out while waiting for program to exit" for some ...
0
votes
1answer
97 views
Error: format specifies type 'char' but the argument has type 'string'
This is the code written:
#include <stdio.h>
#include <cs50.h>
int main(void)
{
string name = get_string ("what is your name\n");
scanf("%s", &name);
printf("%...
0
votes
1answer
19 views
Why does my code count a '.' only at the end of a multi-word string, but not at the end of a single word string?
I don't want my code to count non-alphabetic characters. It doesn't if they are alone, or at the end of a single word string. Why does it count an extra character at the end of a multi-word string or ...
0
votes
1answer
22 views
CS50 Pset2 Readability Second Argument Not Compiling
#include<stdio.h>
#include<math.h>
#include<cs50.h>
#include<ctype.h>
//prototype for a custome function
int letters, words, sentences(string text);
int main(void)
{
// ...
0
votes
1answer
24 views
Pset 2, readability: is everything a float and rounding problems
I' at the very end of readability and am having trouble getting the math correct and rounding it. I'm getting the correct letters, words and sentences, but am getting wildly wrong values for the grade ...
0
votes
1answer
22 views
pset1 problem set 2 readability
I completed the code for pset1 problem set 2 readability as follows
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
int ...
0
votes
1answer
47 views
Caesar works as intended but check50 says it doesn't
I've tested all the possibilities where check50 says my code isn't working as intended and I always get the expected result.
I can't seem to figure out what I did wrong.
Here's check50:
:) caesar.c ...
0
votes
1answer
32 views
Hello everyone, i have a problem with my code for caesar
So when i run the following code in the caesar.c that is located in the caesar folder, it seems to run only for the very first character of the given plaintext and then the next characters are missing....
0
votes
2answers
29 views
Char repetition in key
I 'm trying to avoid char repetition in key
// making chars array of alphabets
string alph = "abcdefghijklmnopqrstuvwxyz";
//making sure that there is no character repitition
char rep[26] = ...
0
votes
1answer
42 views
Implementation problem
#include <stdio.h>
#include <ctype.h>
#include <cs50.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
int main(int count, string input[])
{
// ...
0
votes
1answer
44 views
caesar pset2 "expected expression and use of undeclared identifier" error
When compiling this code getting mutltiple errors any idee why is the couse of these errors thanks.
#include <cs50.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#...
0
votes
1answer
35 views
incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int'
I keep getting this error when I try to compile my program: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int'
{
if (argc != 2)
{
printf(&...
0
votes
1answer
35 views
Pset2 - Readability doesn t compile
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
int main (void)
{
string text = get_string("Text: ");
float num_letters,...
0
votes
1answer
21 views
toupper not executing
I am working my way through approaching the scrabble problem from PSET2. Right now I just want to focus on getting all my string inputs transferred over to uppercase and then having their values ...
0
votes
1answer
25 views
Program won't print out enciphered text
So under "Peeking under the hood" they asked to ignore the key the user provided and instead prompt the user for a plaintext and move each character by 1.
when I run my program, and input &...
0
votes
2answers
44 views
Segmentation error on pset2 substitution
I'm trying to work on "substitution" problem set, but I'm getting an error of "Segmentation Fault" when I run the program below:
In this part of the program I just want to check if ...
0
votes
1answer
41 views
How do I check that every character of an array is a digit and only print out the string if all the chars are digits?
So, in Caesar when validating the key they asked to check if all the characters in the command line argument provided are digits and only printout "Success" and the digits as an integer if ...
0
votes
1answer
419 views
variable used in loop condition not modified in loop body
i'm having some trouble here, not even sure if my loop is correct but i'm also confused as to why I got this error about the why the cents variable can not be modified, if anyone can explain to me ...
0
votes
2answers
34 views
stuck on readability pset2
Hi I am stuck on readability and am not sure what i am doing wrong
$ ./readability
Text: one fish. two fish. red fish. blue fish
8
3
42
13
Grade 13
and my code:
#include <stdio.h>
#include <...
0
votes
1answer
18 views
Logical error in Caesar of Pset 2
The logical error is occurring when i try to shift each character of the plaintext by 1
string plaintext= get_string("plaintext: ");
//aplplying key
for(int j=0,m=strlen(plaintext);...
0
votes
1answer
19 views
Error in Caesar of Pset2 while validating entered key
My question is regarding the step of 'Validating the Key' in Caesar of Pset2 , while checking whether the key given by user consists of digits.
Here is my code :
#include <stdio.h>
#include <...
0
votes
2answers
32 views
Readability Wrong Output at Index around 7-8
I have been struggling with Week 2 Problem Set 2 Readability Question. At this point, I feel like I am stuck, and spend too much time just trying to fix one error. The code works perfectly except &...
0
votes
1answer
24 views
pset2- readability
While counting the number of sentences ( Pset 2: Readability) , how do we differentiate between exclamation marks within a sentence and those which are used to end a sentence ?
This is my code:
//...
0
votes
1answer
20 views
I have included all the libraries, yet it shows errors (pset2)
This is my code:
#include <stdio.h>
#include <cs50.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
int main (int argc, string ...
0
votes
1answer
23 views
Can't check CAESAR pset2
I solved the Caesar problem and it works flawlessly. But I can not check it properly. The results are correct but
'''
check50 cs50/problems/2021/x/caesar
'''
says it is incorrect. If I view the ...
0
votes
1answer
26 views
Check50 problem with Readability
When I submit my readability code check50 says:
Expected Output:
Before Grade 1
Actual Output:
Before Grade 1
Expected Output:
Grade 16+
Actual Output:
Grade 16+
Since my program outputs what is ...
0
votes
1answer
40 views
Help with Either Command Line Argument or Arrays for Problem set 2 Caesar
I am on Problem Set 2: Caesar. Right now I'm trying to write code that first checks if the second command line argument is a int and if it does prints the integer. I got my program to compile after ...
0
votes
1answer
20 views
float rounds with %2.f
I'm working on pset2 with cash.
But something interesting is happening
if input is 6.876 and i printf that value of that variable I get 6.88 instead of 6.87.
How can I get 6.87 instead of round 6.88?
...
0
votes
2answers
36 views
What modification do I need to shorten my code?
I have come up with the following code to solve caesar.c of pset2. It passes all check50 tests. However, it fails to detect when a string input is not a number. The way I understand it, I have to ...
0
votes
2answers
47 views
Caesar Error:Invalid operands to binary expression ('string' (aka 'char *') and 'int') int c = ((int)text + argv[1]) % 26
There are a few errors in my code, but the one I really don't understand is
`caesar.c:25:42: error: invalid operands to binary expression ('string' (aka 'char *') and 'int')
int c = ((int)...
0
votes
2answers
92 views
Caesar : Extra random characters at the end of a char ciphertext array
I'm having a problem with an output. Sometimes output adds an extra characters, different each time the code runs. For example, when I use key "1" and write "a", it displays "...
0
votes
1answer
25 views
Having Trouble using StrCpy with Command Line argument for Problem Set 2 Caesar. Trouble with Array
Hello I'm still fairly raw at this coding thing so i'm sure im making rookie mistakes. I'm doing Problem Set 2 caesar and I've hit a wall and haven't been able to move forward. What I have been trying ...
0
votes
1answer
16 views
Undeclared identifier error inCS50 Pset2 caeser
I keep getting 2 undeclared identifier errors on these respective lines
line 48: printf("ciphertext:%c", ((p[n] - 65 + k) % 26) + 65);
line 54: printf("ciphertext:%c", ((p[n] - 65 +...
0
votes
1answer
29 views
pset 3 caesar - output looks fine but check50 returns errors
PS2 caesar to output ciphertext works fine, and outputs all texts as expected - however check50 returns poor score.
//Code is:
#include <stdio.h>
#include <cs50.h>
#include <string.h>...
0
votes
2answers
39 views
CS50 Readability compile error
Im trying to compile the program but keep getting this error message below:
Can someone tell me what this means please. The carat arrow is supposed to be pointing at "char" and "ch&...
0
votes
1answer
31 views
CS50 readability.c:31:1: error: expected identifier or '(' {
I keep getting this same error message readability.c:31:1: error: expected identifier or '('
{
Please Help! I put my program below:
#include <stdio.h>
#include <cs50.h>
#include <math.h&...
0
votes
1answer
22 views
Input Problem in Char 'P' PSET2 Substitution
QUESTION
When i put cipheralgorithm (which is a function that is making encryption) in comment section (/*)
everything goes perfect i can get input when i type
./substitution ...
0
votes
0answers
29 views
All my functions work individually for Substitution (pset2), but when I put them together the programme doesn't work!
Hey guys :) I've been wracking my brain for ages on my code for pset2 (Substitution) and would really appreciate some help.
I've created a function to convert a string into its uppercase variant, ...
0
votes
1answer
37 views
PSET2, Caesar (less)
My code to assess whether the command-line argument consists solely of digits compiles but doesn't work properly, and I can't figure out exactly what the problem is. Even if I enter an integer-only ...
0
votes
1answer
25 views
Segmentation fault: Pset 2 Caeser isdigit
The log is telling me: "Segmentation fault", and after looking into it, I figured out the problem was in the "isdigit", but i don't know how to fix it, i'm here for about 2 hours ...
0
votes
1answer
26 views
Expected output and output are the same, yet the program somehow isn't correct. Caesar
This is my code:
for(int i = 0, len = strlen(plaintext); i < len; i++)
{
char c = plaintext[i];
if (isalpha(c))
{
char p = 'A';
if (islower(c))
{
p =...
0
votes
1answer
44 views
Why doesn't my Caesar code work?
#include <cs50.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
bool string_validity(string s);
int main(int ...