Questions tagged [for-loop]
The for-loop tag has no usage guidance.
60
questions
0
votes
0
answers
16
views
How to make pset 3 runoff effect multiple eliminated candidates?
#include <cs50.h>
#include <stdio.h>
#include <string.h>
// Max voters and candidates
#define MAX_VOTERS 100
#define MAX_CANDIDATES 9
// preferences[i][j] is jth preference for ...
- 35
1
vote
1
answer
14
views
Nested for loop not returning to parent in substitution.c
I have a nested for loop of
for(int i = 0; i < strlen(key); i++)
{
for(int j = i + 1; j < strlen(key); i++)
{
if(toupper(key[i]) == toupper(key[j]))
{
...
- 13
0
votes
1
answer
30
views
How to Add results of a for loop
any ideas on how I could add the results of a for loop in C?
I'm currently working my way through lecture 1, so I only know a few skills in C so far. My for loop does what I need it to do - it outputs ...
0
votes
1
answer
11
views
Running an 'if' statement inside of a 'for' loop; Need to continue loop w/o printing anything, but not sure what value to return
So, I'm currently working on 'Substitution', and have written the following code to evaluate if a certain array of characters are all alphabetic:
for (int i = 0; i < length; i++)
{
if (isalpha(...
- 3
1
vote
2
answers
64
views
PSet1 - Coins issue
While doing the Coins problem set, I am receiving an error while trying to compile and I can't figure out what the issue is.
"cash.c:53:27: error: variable 'cents' used in loop condition modified ...
- 11
1
vote
2
answers
241
views
Stumped on PSET 1 Mario Less Comfortable
I've been working on this for a while and feel stuck. I think that my "for" loops might be out of order or some other issue. Suggestions? Thanks
- 11
0
votes
2
answers
19
views
for- loop stop if output A
on pset2/caesar
and only when ciphertext[i] = A or a
for loop stopped ????
0
votes
1
answer
86
views
Isalpha not working for all char of my string
I'm trying to use the isalpha() function to check whether all characters of a string are letters or not. However, when I use the debug50 module, it looks like after the first character of the string, ...
- 3
0
votes
2
answers
882
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
1
answer
37
views
CS50 Final Project Jinja For Loop Not Running
My final project is a task website that allows you to create tasks, complete them, and get alerted when you haven't done a task on time. Currently, I am working on alerting when the task is due. The ...
- 67
0
votes
1
answer
51
views
PSET8 Web Finance - Index/Portfolio - Why do my for loop variables not pull over to Portfolio.html?
I have the below code for my application:
#valid stock row queries
valid_stocks_rows = db.execute("SELECT symbol, SUM(shares) as sum_total FROM ledger WHERE user_id=:user_id GROUP BY symbol ...
1
vote
1
answer
52
views
Caesar pset2, printing out the cipher text
I know I'm doing this wrong, and it seems like something I should already know, but for the life of me I can't figure out what I'm doing wrong or how to fix it. Any help would be greatly appreciated.
...
- 15
0
votes
2
answers
91
views
Finance - Index showing correct number of rows but all the same record. For- loop issue?
So I've been looking at this all morning and can't figure what I'm doing wrong. All my variables are producing the correct values so it seems to be something to do with my For loop. In the html ...
- 19
0
votes
1
answer
136
views
Python - for loop not being executed, leading to NameError of variables defined in the loop
It's a simple Python program to find the number of primes until a certain number.
The for z in range(1,y): loop does not execute, but rather execution jumps to the print(count," Pr...) statement ...
- 103
1
vote
1
answer
193
views
pset3 Plurality
Having an issure writing my plurality code pset.
i wanted to have my programme promt a user when they have made an invalid vote entry. and it works ok but ive found a bug while testing it:
code:
#...
- 36
0
votes
1
answer
25
views
My program doesn't run when i close the condition's range. When i leave the range open it does't give the answer i want
#include <cs50.h>
#include <stdio.h>
#include <math.h>
int main(void)
{
float change;
int cents = 0, coin_number = 0, quart = 25, dime = 10, nickel = 5, penny = 1;
//...
- 31
0
votes
1
answer
57
views
Hexadecimal to Decimal Conversion - Loop runs in reverse order (opposite to what is expected)!
The following code converts Hexadecimal numbers to Decimal numbers (successfully). I'm unable to figure out why the code behaves in just the opposite manner as it should be!
I was planning to write:
...
- 3
0
votes
1
answer
238
views
what is the significance of break; in tabulate function?
I know break statements are pretty basic, but it's got me here:
This is my function:
for (int i = 0; i < voter_count; i++)
{
for (int j = 0; j < candidate_count; j++)
{
if (...
- 51
0
votes
1
answer
2k
views
How To Use a For Loop To Store Values Into Multiple Variables?
I'm working on the Credit problem set. Along the way, I've encountered a scenario where I want to use a for loop to store multiple values. If I type printf("%d", cc_number[p]); in that for loop, it ...
0
votes
1
answer
14
views
Pset 2 - loop question
im trying to make it so my program returns Success after it checks whether the provided argument is all digits. i can see why this code prints success 3 times if i provide a 3 digit number as the ...
- 5
0
votes
2
answers
84
views
PSET2 Vigenere: Output bug, keyword loop going over strlen of key
I am having an issue specifically with the second for loop (under "//iterate over key inputs" comment). The counter j is going over the strlen of argv[1], and thus feeding a wrong input to my shift ...
0
votes
1
answer
25
views
i want the number of line in which the function is locate , like the function "func2" is in second line so the output shoud be 2 [closed]
#include<stdio.h>
#include<string.h>
unsigned int FindFunctionDefn( char strFunctionName[], char
strSourceCode[] ){
int n = strlen(strSourceCode);
int m = strlen(...
0
votes
1
answer
50
views
mario and problems with my array
# include <stdio.h>
#include <cs50.h>
So I've been playing around with this problem alot and unforturnatly asked many questions. But I think I've figured out the basics, if not back to ...
- 17
0
votes
2
answers
228
views
pset4 how does incrementing j help to iterate over pixels?
I'm currently working my way through understanding the code of copy.c used in "whodunit" and "resize".
This loop is supposed to iterate over the scanlines of a Bitmap (by incrementing i) and within ...
- 3
0
votes
1
answer
99
views
Many Error Messages Surrounding For Loop
I've been working on my caesar.c and I've built this so far. Unfortunately when I try to compile it I'm greeted with a flood of error messages surrounding the for loop noted below. I cannot figure out ...
- 3
1
vote
1
answer
48
views
Pset2 - Vigenere - Encypts all variations of "barfoo" as "ca\..." (no case issues)
This is my first question on Stack Exchange. I had a few different issues with this problem but I felt I'd finally sorted them out until I ran into this. I've been working for a number of hours today ...
- 13
0
votes
1
answer
34
views
PSET3 Game of Fifteen init for loop stops unexpected
So I am stuck at initializing the board. my for loop is doing what it should but it stops when it is not actually done. The board I initialize is made of the dimensions d * d and should start left to ...
- 101
0
votes
0
answers
40
views
What is wrong with my code?
In this program I am trying to receive an input as a string using argv[]
and then I am trying store corresponding values of argv[1][i] into an array var[i] using switch case and I am finally adding up ...
0
votes
1
answer
28
views
I have described below the problem. Can someone answer? [closed]
For(i=4; i<8 )
so in the start with i = 4 and I want to get
4+1=5
5+8=13
13/2=6
6+1=7
7+8=15
15/2=7
7+1=8
0,1,2,3,4,5,6,7,8
How do I do this?
- 31
0
votes
1
answer
43
views
pset4 resize - can't write all the characters from infile to outfile
everyone! I really need your help. I'm working on pset4 and trying to understand the logic of resize problem.
I have two files:testinp.txt and testout.txt.
Inside of testinp.txt I have:
...
0
votes
1
answer
804
views
Problem with "expression result unused error" in for-loop?
I am getting an error message of "expression result unused" for the bottom two for loops (specifically h + 1 and s - 1). I've tried looking for through the other questions for an answer but nothing ...
- 1
0
votes
1
answer
1k
views
For loop help in python
i'm trying to do a 'for' loop in python, but my values keeps getting replaced. How can i write the code below in a way where i can keep a record of each iteration?
Should i be using a list[] instead ...
- 179
1
vote
1
answer
5k
views
Pset7, Index: How to use loops in Python and Jinja?
I felt like I could understand the for loops great in c, but seem to be hitting a wall here.
Some generic conceptual questions before i get into it:
1) ANSWERED. what sequence does the program run, ...
- 179
0
votes
1
answer
304
views
How do I add a condition to a for() loop in Python?
I'm porting crack.c to crack.py.
I crack.c, I am able to do this:
for (int i = 0; i < sizeof(letters) && strcmp(hash, solve) != 0; i++)
In order to break the for() loop if I find the ...
0
votes
1
answer
253
views
new to Python: for loop
I see David using a lot of for loops like this, usually in a table:
for (singular variable) in (plural variable)
e.g.
for registrant in registrants
He doesn't actually declare the singular ...
- 179
1
vote
1
answer
109
views
PSet1 While Loop to Print Spaces for Mario Not Working
I have approached this problem by using a forloop with two nested loops. The second nested loop works and prints the correct number of hashes. The first nested loops does not appear to working at all, ...
- 45
3
votes
3
answers
12k
views
MARIO LESS COMFORTABLE
I have been working at this pset for hours. within 5 minutes i got the hello.c and water.c assignments completed. But when it comes to mario.c, I am utterly lost.
I have watched every video. I ...
0
votes
0
answers
550
views
I'm working on isbn.c. Here, instead of one 'yes', it's displaying several yes'es. What mistake did I make?
Why is my output showing 'yes' multiple times? I think it's because the values of 'num' and 'num1' are being run separately each time to make the value 'finally', but I'm not sure. Please help me fix ...
- 1
0
votes
2
answers
63
views
PS7: Please give me a hint on flask loop usage
Despite reading documentation I cannot figure out why my loop is not functioning properly and is only dynamic for stock symbol? Am I meant to be using multiple nested loops passing all prices, holding ...
- 5
0
votes
1
answer
1k
views
CS50 2017 Problem Set 6 Mario.py For loop
What is wrong with my second For Loop (spaces)? It seems like it only runs one time, according to the first line of the pyramid.
import cs50
while True:
print("Type a number between 0 and 23: ", ...
user13767
0
votes
1
answer
90
views
pset1 mario.c this works, but can I better optimise?
Here is my code:
include
include
int main(void)
{
int h; //gettin some input.
do
{
h = get_int();
printf("height:\n"); //prompting for input.
}
while (h <= 0 || h > 23); //...
0
votes
1
answer
448
views
Loop breaking in quick sort algorithm
Implement quick sort algorithm with faulty results. Details of what I want to do can be found at the video: https://courses.edx.org/courses/course-v1:HarvardX+CS50+X/courseware/...
0
votes
1
answer
101
views
Parentheses or Brackets Problem?
I get this error, but I can't find where I forgot a paren / bracket...
int SUM1 = 0;
if ( (length == 13) || (length == 15) )
{
for (int a = 1; a < length; a++2)
{
...
0
votes
1
answer
69
views
PSET6 Load - How To Approach? Also, Is It Better To Use While() Loop or For() Loop?
I watched the walkthrough for load, but I am struggling to understand what the problem set is asking for. What is load's objective, and what is the best way to approach load?
I also don't know ...
- 800
0
votes
1
answer
70
views
vigenere.c cs50 plaintext for loop starts after the key array loop ends
i need help in the sense that if i run my program with the key being one letter, whether capital or lowercase, it works properly, but if more than one letters in the key, the last letter is used for ...
0
votes
1
answer
29
views
FOR loop error when compiled
Hey guys i was getting some compile errors on for loops that I thought to be sound, i put together a simple test for loop and received the same errors. Have i made a mistake or is there something ...
0
votes
1
answer
295
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 ...
- 103
1
vote
1
answer
541
views
still needing help with mario
I have read and re-read through the help provided for mario here and other places, but am stuck at getting the right number of lines, but not the right characters in each line (i am substituting a for ...
- 11
0
votes
1
answer
198
views
For Loops in Itsa Mario pset1
I don't understand what to put in for the (initialization; condition; update) part of the for loop. I used 4 variables in my code: i = height, r = rows, j = spaces, n = hashes. Whenever I type in "...
- 23
0
votes
1
answer
74
views
Pset1 Greedy: How can i use a variable that is inside a for loop, outside the for loop?
//My code prints all of the coins
//I cannot seem to be able to use the variables that are inside the for loop, outside that loop.
//Any Ideas?
int main(void)
{
float f;
do
{
...
