Questions tagged [pset3]

The problem set for Week 3 asks students to write code for a classic puzzle game in the C programming language.

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PSET3 Tideman - What to do with the lock_pairs function?

Can someone please help me with the lock_pairs section of the problem? The lock_pairs function is killing me. I get that you have to compare the pairs to each other and then return false or true in ...
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why am i getting an “ use of undeclared identifier 'j' or 'i' ” on the vote and tabulate functions?

shouldn't the compiler consider the 'i' and the 'j' from the for loop in the 'main' function to be the voter and rank ints passed to the functions #include <cs50.h> #include <stdio.h&...
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I do not understand what is happening in this line of code from pset3 tideman

// Update preferences given one voter's ranks void record_preferences(int ranks[]) { // TODO for (int i = 0; i < candidate_count; i++) { for (int j = i + 1; j < ...
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cs50 plurality invalid vote

I'm working on plurality on pset3, and so far I haven't edited any code, but whenever I try enter a vote it comes back as 'invalid vote'. Is this normal? And if so what should I do to solve this bit.
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Pset3 Runoff Tabulate Function

I'm stuck on tabulate function, my code didn't pass any of the requirements in check50. Requirements: tabulate counts votes when all candidates remain in election tabulate counts votes when one ...
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PSET 3 Plurality Print_winner function prints smallest number of votes too many times (sorting algorithm?)

I am doing Problem Set 3 Plurality. I am currently on the print_winner function. My program compiles but I'm having issues because it does not print the winner and any ties it prints whoever got the ...
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Runoff: Issue with check50 on find_min function

I've tried two different variations of my implementation of the find_min functions and both times two of the requirements on check50 are achieved and only one shows an error. Sucesses: :) ...
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Warning for anyone doing pset3 timean print winner

you have to print ALL the winners. Even though the prblem brief says otherwise, there are instances with more than one source. So you have to print out every source. It's caused me a lot of headaches, ...
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Need a bit of help in lock_pairs function of tidema(Pset3)

Here's my code for lock pairs- bool check_cycle(int start, int end) { if (end == start) { return false; } for (int i = 0; i < candidate_count; i++) { if (locked[...
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1answer
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Passing arrays into function in tideman

I've created a solution to week 3's tideman problem which is entirely logically correct. Unfortunately, I had to dodge the standard solution by commenting out parts of a function and altering its ...
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pset3, tideman, cs50 2021

I worked with pset3 and I think there are nothing wrong with my code, but check 50 says it has 2 problems on my code. 1.:( lock_pairs skips final pair if it creates cycle 2.:( lock_pairs skips middle ...
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Can't determine the problem with my tideman program - check50 fails at lock_pairs function, says I didn't correctly lock all non-cyclical pairs

My program for the tideman problem in pset3 passes all check50 checks except for :( lock_pairs skips final pair if it creates cycle lock_pairs did not correctly lock all non-cyclical pairs Here ...
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My tabulate function won't work for multiple eliminated candidates

I dont know what to do. My tabulate function won't work for multiple eliminated candidates and multiple rounds of preferences. The rest is fine, as check50 states: :) tabulate counts votes when all ...
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71 views

Pset3 Runoff is_tie

Having issues with Check 50 and the is_tie function: :( is_tie returns false when only some of the candidates are tied is_tie did not return false :( is_tie detects tie after some candidates have ...
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Pset3 Plurality: program runs fine when I check manually, but Check50 disagrees

I wish I could be more specific with my question, but the problem is as the title suggests, check50's results do not seem to comport to mine. When I put it through check50, it fails on print_winner ...
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Problem incrementing vote in plurality

EDIT: I FIGURED IT OUT AND IT IS NOW WORKING. My code does not increment the vote. It correctly prints the invalid vote- but its not increment the vote at all. #include <cs50.h> #include <...
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cs50 pset3 runoff tabulate function help

I have been stuck at the tabulate function for quite some time, I'm able to code all the other functions except for this tabulate functions. If possible do help me look to see what wrong with the ...
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Plurality print_winner function gives one error

This is my print_winner function void print_winner(void) { int winner_vote; for (int i = 0; i < candidate_count; i++) { for(int j = i + 1; j < candidate_count; j++) {...
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pset 3 tideman print winner does not exist despite being declared

I have such a strange behavior here in pset 3, tideman. I am doing the print_winner function because check50 says everything else is fine, but when i run the program it looks like print_winner does ...
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101 views

cs50 plurality non-void function does not return a value in all control paths error

I'm currently trying to do cs50 pset3 plurality problem and I have unfortunately ran into this error which I do not know how to overcome. The error is "non-void function does not return a value ...
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Tideman error: :( lock_pairs skips final pair if it creates cycle

It would be amazing if someone had the time to look through my code for the Tideman exercise :D I get the following error: :( lock_pairs skips final pair if it creates cycle lock_pairs did not ...
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1answer
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Sort_pairs fails check50 tideman

My sort_pairs function fails the check50 **:( sort_pairs sorts pairs of candidates by margin of victory ** test however it passes the usage case given on the CS50 website. In the pair type def, I ...
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1answer
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Plurality error :( vote produces correct counts when all votes are zero

#include <cs50.h> #include <stdio.h> #include <string.h> // Max number of candidates #define MAX 9 // Candidates have name and vote count typedef struct { string name; int ...
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Problem set 3 plurality compilation mystery [duplicate]

In my program of problem set 3 plurality i compiled it and it got compiled and it was working good but when i ran check50 it is telling that "plurality.c code failed to complie" in a red ...
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pset3 plurality— my code is working fine and the prints out multiple winners as well but when i try check50 it fails can anyone tell what is wrong

#include <cs50.h> #include <stdio.h> #include <string.h> // Max number of candidates #define MAX 9 // Candidates have name and vote count typedef struct { string name; int votes; } ...
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PSET 3 - Tideman: Lock Pairs Function

So basically I've got ': )' on everything except : ( lock_pairs skips final pair if it creates cycle Cause lock_pairs did not correctly lock all non-cyclical pairs : ( lock_pairs skips middle pair if ...
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1answer
31 views

Pset3 Tideman: Why is my sort_pairs function not working?

I'm green on all the criteria before sort_pair. Here's my code so far: // Sort pairs in decreasing order by strength of victory void sort_pairs(void) { // TODO // Create array of strengths of ...
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PSET3 Lock Pairs Function Question

Is there any reason why the while-loop in the below code will not work? `#include <cs50.h> #include <stdio.h> #include <string.h> // Max number of candidates #define MAX 9 // ...
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1answer
25 views

CS50 Tideman : Sort Pairs problem - check50 automatic test fails, but output seems correct

Good morning guys, I am working on implementation of tideman. Particulary at implementing sort_pairs function. I have written it and tested - and the output seems sorted in a proper way. However - ...
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1answer
33 views

CS50 Pset3 Plurality

I have issues compiling my program since the last two checks for checkcs50 wont work. It says:problem withprint_winner function did not print both winners of election :( print_winner prints all names ...
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1answer
136 views

PSET 3 Runoff Error: variable length array declaration not allowed at file scope

I realize that this code is not well designed, however I will try to solve that once my code can compile. #include <stdio.h> #include <cs50.h> #include <string.h> typedef struct { ...
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194 views

PSET3 Tideman: Lock_Pairs Help

I've been stuck on this function of the PSET for a couple of days now. I have met every requirement in check50 except for the one that says, ":( lock_pairs skips final pair if it creates a cycle; ...
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Creating my own Header file

I am at pset3 and I decided to try creating my own mergeSort header file. This is something that I have never attempted and haven't learned much about yet so I am at a loss. I have created the the ...
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1answer
39 views

Why do I keep getting the error “expression result unused” in PSET 3 runoff?

I keep getting the error "expression result unused" on the line with preferences[i][j]; . I've tried reinitializing the j and the i variable in the loop in different ways but nothing I've ...
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1answer
32 views

pset3 - plurality - failing check50 'print multiple winners' - but my own tests say it works, not sure what I'm missing

I'm not sure why my program is failing check50, when I run my own tests it does seem to print multiple winners, but check50 says it doesn't print multiple winners [removed solution code]
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1answer
116 views

Tideman - :( lock_pairs skips final pair if it creates cycle

I have a problem in my Tideman program, it get the error ":( lock_pairs skips final pair if it creates cycle". Can anyone help me figure out what's going on? #include <cs50.h> #...
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1answer
60 views

Tideman: invalid operands to binary expression ('void' > and 'int')

I'm getting the following error on creating the lock-pair function: tideman.c:259:36: error: invalid operands to binary expression ('void' and 'int') if (check_winner(pairs[i]) == -1) Can someone ...
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1answer
31 views

Segmentation fault tideman swap function

I'm getting segmentation fault due to my swap function I believe - but can't figure out where it comes from. #include <cs50.h> #include <stdio.h> #include <string.h> // Max number ...
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1answer
33 views

Plurality - Why do I get segmentation fault?

I've tried running the program but when I put into an incorrect vote I get "segmentation fault". What's wrong? EDIT: I've changed: while (n < candidate_count) to while (n < ...
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1answer
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Please help me by reviewing my logic for Tabulate in Runoff Pset3

Let's say 3 candidates were their initially and A and B got 2 votes each while C got 1 hence C should be eliminated then in the next round we need to see the second preference votes right? As the ...
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1answer
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pset 3 Runoff Where is my code wrong?

I have written the functions but I am not sure which one is wrong as I am not getting any output Here is my code: // Record preference if vote is valid bool vote(int voter, int rank, string name) { ...
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1answer
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Tabulate in Runoff

Finally took a break for a few days to think about stuff and I am back at doing psets Now I am trying to fix the tabulate function, here's my code - void tabulate(void) { for (int i = 0; i < ...
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Tabulate function in Runoff

Here is my code void tabulate(void) { for (int i = 0; i < candidate_count; i++) if (strcmp(candidates[preferences[i][0]].name, candidates[i].name) == 0) { ...
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1answer
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Vote Function in Runoff

Here's my code bool vote(int voter, int rank, string name) { int j = 0; for (int i = 0; i < voter_count; i++) if (strcmp(name, candidates[i].name) == 0) { preferences[i][...
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PSET3 Tideman Sorting Check50 Error

What's the difference between these two codes? Why does the first return me no error from check50 while the second one does? void sort_pairs(void) { int max; for (int i = 0; i < pair_count; ...
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Is my vote function correct in Runoff?

I have started runoff and just completed step 1 that is to write the vote function can someone tell me if it's correct? It seems to give the correct output but I don't think I used int rank in the ...
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1answer
26 views

Are we supposed to use Algorithms in pset3?

I know it might sound silly but I've done Plurality and right now I am doing Runoff but I don't feel the need to use any of the algorithms like Bubble Sort etc. specifically. Is this right or should I ...
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pset 3 runoff - problem with tabulate

I am a (very) beginner coder, so pls be gentle!! I have numerous mistakes in my code, but am unsure how to fix them. The code is working for some things, and I have scored 73 % on the problem set, but ...
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30 views

cs50 pset3 print winner function

Im strugling with print_winner function in Tideman election program. In my opinion function workes fine. It prints the candidate which has all false values in column under his name (number) in locked ...
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2answers
47 views

Check50 all green but my own tests fail

I completed Runoff with 100% pass in check50 but when i do my own tests i get wrong winners. I checked everything to the best of my abilities but i just can't find the problem and it's driving me ...

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