All Questions
23 questions
-1
votes
1
answer
28
views
CS50 Week 1 credit card problem set
I am having trouble debugging my code. The logic looks right to me, but whenever I try running credit card test numbers, my code will only sometimes correctly identify the card type.
I have tried ...
1
vote
2
answers
96
views
Problem With Check50 for problem set "Credit"
I'm currently working on week 6 python and the problem sets are the same to that of pset 1 just with python instead of C. So when I decided to write it I saw that my code in C was extremely bad so I ...
- 13
1
vote
1
answer
40
views
CS50x PSET1 Credit <class 'pexpect.exceptions.EOF'>
So regarding Pset 1 Credit, I'm having this issue with Check50
My code identifies the card, but there's some error when input given at shorter length:
My code are the following:
#include <cs50.h&...
- 11
1
vote
1
answer
49
views
CheckSum in credit pset1
as in the code given below i want to multiply 1 by 2 then delete it and so on but i don't how to do that i made the first steps to delete the last number by using %10 then show it with the /10 i hope ...
1
vote
1
answer
52
views
Credit : the checksum is correct for <10 digits, but for14,15,16 digits getting negative checksum
The checksum is correct for less than 10 digits but for 14-16 digits it is coming back negative. What am I doing wrong?
#include <cs50.h>
#include <stdio.h>
#include <math.h>
int ...
- 13
0
votes
1
answer
30
views
For Loop to look through all values of an Array
So, I am learning C using cs50 and a problem I have run into is that although i have yet to learn about arrays, I need to use arrays for my problem set. I would really appreciate it if someone could ...
- 3
0
votes
1
answer
29
views
How to Solve : expected identifier or '('
here is my code:
#include <stdio.h>
#include <cs50.h>
//Declaring User-Defined Functions
int last_digit(int sum3);
int main(void)
{
//Promting the user for credit card number
...
- 3
0
votes
1
answer
145
views
Need help with the Credit Problem for Week 1
I have signed up for this year's CS50x, and I am stuck on the problem where we are meant to validate a credit card. The problem requires that we check the amount of digits, the first digits and use ...
- 1
0
votes
1
answer
69
views
credit pset1 cs50 sum while loop
I was doing the credit problem with the visa test card in the page: 4003600000000014
It passed that test, however in other tests it doesn't pass.
I think it's a matter of the sum that it can't compute ...
- 1
0
votes
1
answer
89
views
PSET 1 Credit Card Checksum doesn't add up
I'm having my issues finding the right answer as this is non code related.
The checksum says: "If the total’s last digit is 0, the number is valid!"
This is a credit card number that is ...
- 3
0
votes
1
answer
183
views
Credit (Pset1) - Checksum problem
so I have a problem with the Credit exercise from pset1. I updated my code today after realizing that I didn't split up the digits of the product of the current digit in the card number and 2 and ...
- 137
0
votes
1
answer
113
views
My do-while loop does not work
do
{
number = get_long_long("What is your credit card number? ");
}
while((number < 1000000000000) || (number >= 10000000000000000));
This loop is not accepting inputs. I do not ...
0
votes
1
answer
88
views
pset1 credit: I am unable to identify what's wrong in the logic of my code?
Kindly tell me what mistake have I made in this program? pset1 Credit: (my code) https://pastebin.pl/view/5646dbf1
1
vote
1
answer
9k
views
error: result of comparison against a string literal is unspecified (use strncmp instead) and Check50 showing error on credit problem
I've submitted my credit problem after testing with possible values and everything seems to work just fine as planned, except that I got some errors that certain numbers could not be tested as INVALID ...
0
votes
1
answer
72
views
What is probably wrong in this while loop?
I'm getting positive integers from users.
I used a do-while loop to check and validate that the user input is:
1. A positive integer.
2. The length (I.e size) is between 13 and 16 digits BUT NOT ...
1
vote
3
answers
144
views
Why is this while loop generating errors
I'm trying to get a 15 or 16 digits numbers (integers) from users and then using a do while loop to check if the user entered a valid number, otherwise, they will be re-ask to enter the number.
THE ...
0
votes
1
answer
48
views
pset1:credit, multiplication problem
for some reason my program doesn't multiply (card_number % 10) * 2 for example when card_number % 10 = 6 the output is 6 instead of 12.
for(int x = 0; card_number != 0; x++)
{
if (x % ...
0
votes
1
answer
2k
views
pset1 | error: invalid operands to binary expression ('long long *' and 'int')
Here are snippets of my code:
long long card = get_long_long();
long long *FindLength = *card;
while (FindLength != 0)
{
FindLength = FindLength / 10;
counterCardLength++;
}
And ...
- 15
0
votes
1
answer
60
views
Pset1: Error when trying to assign single digits of int variable to array using for loop
I'm currently working on Credit. I'm trying to find the first two digits of the card number using a for loop. I've created an array named firstdigits with two elements. Then I've created a for loop to ...
- 15
0
votes
1
answer
1k
views
How to find the length of a number
I'm working on Credit and am at the point where I have completed all the required calculations on the credit card and now need to find out if the final sum ends in zero or not. I think that in order ...
- 15
0
votes
1
answer
407
views
PSET1 / Credit / Modulo problem / Error: invalid operands to binary expression ('double' and 'double')
I have a problem with a modulo in “Credit”.
That is a part of my initial code:
#include <stdio.h>
#include <cs50.h>
#include <math.h>
int main(void)
{
//...
- 28
0
votes
1
answer
134
views
Problem with my credit.c code
My credit.c code keeps inserting huge numbers in my array for seemingly no apparent reason. For example the user enters 45231 for the credit card number, the beginning of the array is fine and ...
0
votes
1
answer
191
views
pset1 problem with digit acquisition
I'm working on credit in pset1 and I'm having problems with getting every other digit. I opted to use arrays and fill them using for loops (as shown below) but for whatever reason the output is ...
