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Week 1 - Problem concerning question on 'credit'

Consider: #include <cs50.h> #include <stdio.h> int main (void) { //User's Input long n = get_long("Number: "); int sum_of_odds = 0; int sum_of_evens = 0; ...
0 votes
1 answer
105 views

Need help (or idea) making the code looks cleaner. (PSET1/CREDIT)

My code passed pset1/credit but I still think the there must be a way to make my code looks cleaner and more impact. If you have any idea please criticize the code. Thank you in advance. #include <...
0 votes
1 answer
89 views

HELP ME!! CS50 pset1 credit.c says INVALID but when I debug it says AMEX?

#include <stdio.h> #include <cs50.h> int main(void) { long long cc; //get user input for cc do { cc = get_long_long("Number: "); } while (cc <= 0); /...
0 votes
1 answer
70 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 ...
0 votes
1 answer
47 views

trouble summing the sides on credit

I have made it to the point it separates every digit into two sides so as to have two different sums, but then It gives me the wrong value of the sum. I'm pretty sure there is a bug in therms of it ...
0 votes
1 answer
129 views

PSet1 Credit Invalid VISA that shows as Valid. My checksum must be wrong but dont know why

*/Here is the error I get: :( identifies 4111111111111113 as INVALID expected "INVALID\n", not "VISA\n" :( identifies 4222222222223 as INVALID expected "INVALID\n", not &...
0 votes
1 answer
94 views

pset1 credit working only in certain cases

So, this is probably not a good solution of the problem, but I hoped it would at least work, after struggling with it for quite some time. It made me happy to see it worked for the first number I ...
0 votes
1 answer
81 views

Pset1 valid visa number as invalid

I built the first part to check whether a number is a valid AMEX number and used the same logic to check for Visa number but the codes don't seem to work as I tried with several valid visa numbers and ...
0 votes
1 answer
295 views

pset1 credit assignment

I assume anyone looking at this question knows the assignment but to recap I need to write a program that will identify different CC#s—AMEX, MC, VISA, or Invalid. Since all these CCs range from 13-16 ...
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1 answer
25 views

Week 1 Credit, two visa cards #s not working

I've been stumped on Credit for a few weeks, I've learned a LOT in writing my code and I have fixed many errors. My code now passes all the checks except for these two errors and I cannot figure out ...
0 votes
1 answer
276 views

RE: Credit in PSET1

I have come up with, what seems to me, to be a logical walkthrough of the CREDIT problem (after banging my head against a wall for too long) - but the code does not make sense to the compiler. And I ...
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
27 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 ...
0 votes
1 answer
297 views

Hacker pset1 credit.c always gives invalid?

I tried to attempt the credit.c problem. My code is as follows: #include <stdio.h> #include <cs50.h> #include <math.h> #include <string.h> int main(void) { printf("Please ...
0 votes
1 answer
47 views

Pset1 Credit - Why is my code bypassing the Floor function inside If statement?

Here's my code- int f_1 = floor(N / 1000000000000000); int f_2 = floor(N / 1000000000000); int f_3 = floor(N / 100000000000000); int f_4 = floor(N / 10000000000000); if (...
0 votes
1 answer
49 views

Output problem credit

Finished my credit problem, whit the code below, but when I check it with check50 everything fails despite the output on the terminal being correct when I check manually. Code: #include <cs50.h> ...
0 votes
1 answer
146 views

CS50 problem set 1 CREDIT works sometime but not always

I am very new at coding and taking CS50. I am currently working on the credit problem in week 1. I finished coding but when I ran check 50 my code only seemed to work for some of the card numbers and ...
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1 answer
30 views

When I multiply my array by 2 it doesn't give expected value

Also, please when I try to add "firstnumsum", it doesn't give expected value and I don't know what to do. #include <cs50.h> #include <stdio.h> #include <string.h> #include &...
0 votes
1 answer
131 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
601 views

pset 1 credit.c

I started with the credit card case but I am lost I wrote this till now I want some help to know what to do next of course not giving the whole thing because this is the purpose of the course... ...
0 votes
2 answers
190 views

Credit pS1: how to store the separate digits and store them

I have made some progress, but I can't store the separated digits. It only stores the last one in "remain". My other challenge is that separating the digits above 9 gives the result "0&...
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1 answer
95 views

i don't know what's wrong with my code. Trying to convert from string to long

INPUT int main(void) { long long cardnumber, calc; string credit[0]; string nonnumeric; //long long calc = card number; int countcardcharacters = 0; long long c; //user input do { credit[0]= ...
0 votes
1 answer
85 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
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1 answer
69 views

Check50 giving different results from the code I compiled in pset1

For Problem Set 1, I have the code as written below #include <cs50.h> #include <stdio.h> int card_length(long cNo); void luhn_algo(long lacno, int lacnolen); void finalPrint(int cardDet);...
1 vote
2 answers
87 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 ...
1 vote
1 answer
32 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&...
1 vote
1 answer
43 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
47 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 ...
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 ...
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0 answers
136 views

Can anyone help me troubleshoot my code for the CS50 Credit problem? (**not trying to cheat, just need some help!)

This is the code I have written in c for the cs50 credit pset 1 problem. I am checking the length of numbers entered, and the first digits (AMEX 15 digits, starts with 34 or 37; MC 16 digits, starts ...
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0 answers
33 views

What do you think about my code here?

#include <cs50.h> #include <math.h> #include <stdio.h> #include <stdlib.h> int main(void) { long long credit_num; credit_num = get_long_long("credit number: "...
1 vote
1 answer
329 views

problem with credit with this numbers (369421438430814 & 5673598276138003)

I just finished solving the credit problem and regularly used check50 to see my results, and then this happened. check50 sees that these numbers : 369421438430814 5673598276138003 are invalid, even ...
0 votes
2 answers
44 views

pset1-credit I can't find the issue with my code

the program prints invalid for valid card I know that my mistake is probably really dumb, but I can't find it (sorry for bad english) #include <cs50.h> #include <stdio.h> int main(void) { ...
0 votes
1 answer
26 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 ...
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37 views

pset 1 credit 2022

At the outset, I want to say that I tried to complete this task with arrays and don't know how to make it witout them. Here is my code: #include <cs50.h> #include <stdio.h> int main(void)...
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1 answer
41 views

pset1 credit 2023 , do while loop with arrays/intervals

#include <cs50.h> #include <stdio.h> int main(void) { long n; do { n = get_long("13 digits or at max 15, 16 card number: "); } while(n < ...
0 votes
2 answers
69 views

Why does this code sometimes give me a different sum when i run it for the same cc number?

I'm working on the credit problem in pset1, and this is only part of what should be done. All I'm trying to do here is to multiply every other number (from the cc number entered by the user) by two, ...
-1 votes
1 answer
48 views

cant figure out whats wrong with my credit code

#include <stdio.h> #include <cs50.h> #include <string.h> int numlength(long num); int main(void) { long num; do { num=get_long("Number :") ; }while(num<0)...
0 votes
1 answer
29 views

Getting "use of undeclared identifier" and can't solve it without ruining my code

i've been working on the mechanism to get every other number of the credit card number, and this is what i've come up with so far: int get_credit(void); int check_sum(int number, int a); int ...
0 votes
1 answer
116 views

pset1:Credit (always outputs INVALID)

Whenever I input any card number into the program it outputs INVALID. I think the issue has something to do with not finding the first digits (int fdig) correctly because I used a print function ...
0 votes
1 answer
37 views

there is a logical error I can't really catch up with

Output: Results for cs50/problems/2022/x/credit generated by check50 v3.3.7 :) credit.c exists :) credit.c compiles :) identifies 378282246310005 as AMEX :) identifies 371449635398431 as AMEX :) ...
1 vote
2 answers
616 views

Credit.c is my nemesis

I have no experience programming, and English is not my first language so I'm struggling a lot with this particular problem. In "credit.c" you have to prompt the user for a credit card number and ...
0 votes
1 answer
97 views

credit.c I don't understand how to fix my code

I've been trying to figure out what's wrong with my code. I used printf so I could confirm whether or not the value of N is correct but it's coming out as completely different as what I would expect ...
0 votes
2 answers
112 views

Pset1 credit, checksum value gives wrong value

I find myself stuck on credit. Can't figure out where the problem lies in my logic. Checksum gives 4 where it should give out 0. Ideas appreciated. //calculate checksum value int sum1, ...
0 votes
1 answer
68 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 ...
0 votes
1 answer
34 views

Recalling the function for output changes the input

#include <stdio.h> #include <cs50.h> #include <math.h> int procedure (int array[] , int length); int input_length ( long input ); int main (void) { long card = get_long("...
0 votes
1 answer
43 views

I have to enter any letter to get the result

I am currently doing the problem set 1 credit in cs50 program. I managed to write the code. It's compiles fine however once I enter the credit card number it stops, i must type any letter to get the ...
0 votes
1 answer
111 views

Credit Card Check

So I am on pset6 trying to implement the credit card check. I've already completed working through the numbers and am not having any issue with the actual algorithm. But for some reason my if ...
0 votes
1 answer
86 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 ...
0 votes
1 answer
169 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 ...