Questions tagged [loops]
The loops tag has no usage guidance.
18 questions
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Converting roman numerals to integer
I'm doing some practice with pointers and seemingly basic touchup of these concepts, the task is simple, given 3 pre-entered test cases( strings of roman numerals) convert each to a number and tally ...
2
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1
answer
420
views
What's the most efficient prime-finding algorithm? (Week 1 Practice Problems)
In the Prime practice problem, there's a thought question that says:
Can you make the prime-finding algorithm more efficient than checking
if a number is divisible by every number between 2 and 1 ...
- 23
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1
answer
50
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What is wrong with my nested loop? Why doesn´t it print what it should?
So, I am trying now to make a pyramid of hashtags which in every row has a number of spaces before from the left side of the hashtag. In the program it starts with a prompt from the user between 1-8 , ...
- 7
0
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1
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17
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How can i arrange the output in decending order In this program? [closed]
#include <stdio.h>
int main()
{
int n,i;
printf("Enter a number: ");
scanf("%d",&n);
for (i=0; i<=n; ++i)
{
if (i%(7*13*19)==0)
{
...
- 3
0
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2
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211
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rejects a height of 9, and then accepts a height of 2 expected "" #"\n"##"", not ""
This is my solution for the cs50 pset1 (less). Passes ok all the test cases except for the "9 then 2" case. I tried it in the IDE myself and after passing 9 and the any other integer the ...
0
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1
answer
74
views
Mario Less Loops doubt and code review
I have attempted the PSET 1 of 2020 CS50x and have a couple of doubts. Could someone check if the following code for Mario less one is correct. If it is I also had a question that what should I put ...
- 1
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32
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Week 1 Super Mario Level 2
All, I have Mario built if I input numbers 1-8. However I can't get it to run a second time or re-run if I put in a number like 9. I think I need to have a loop to return it to the top. Have tried ...
0
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1
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14
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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
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2
answers
1k
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While Loop in C only executing once and then stopping
I have created a function in C that tests if an integer in between a range of 100 (min) and 500 (max) - The function calls on another function called "getInt()" which tests whether the integer is ...
- 11
0
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1
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28
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Selection Sort: Holes in Logic
#include <cs50.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(void)
{
string s = get_string("Enter a number: ");
string answer ...
0
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1
answer
46
views
Infinite loop in pset2 Initials
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
int i;
int main (void)
{
printf("Your Name: ");
string s = get_string();
if (s !=NULL)
{
printf("%...
0
votes
2
answers
197
views
pset2 initials.c, returning first initial
I originally used a for loop (for(int i = 0, n =strlen(name); i < n ; i++), but decided to try a while loop setting i=1. Either way my output is always limited to the first character.
I've tried ...
- 1
1
vote
0
answers
787
views
Every 2nd digit on Pset1 Credit problem: Tldr bolded
Im struggling with manipulating the string of numbers in the credit problem. I've figured out how to divide the initial input number by 10 (*100 each iteration) then mod % by 10 in order to access the ...
- 11
0
votes
1
answer
61
views
Resize.c is not copying pixels correctly
I have been stuck on this problem for over a week now. I can not seem to get the inner for loops to correctly copy and place the pixels from the infile.bmp to the outfile.bmp. I am able to created the ...
0
votes
1
answer
91
views
Understanding for loops and lingering questions I need answered before moving on!
I coded this and it passes. I just want to understand it much better than I do at this moment. I got hung up on a few of things and found the solutions online to those questions I was having but I ...
0
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1
answer
94
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PSET 4 - Recover.c only recovering one empty file
My code compiles and actually recovers 1 single image, an empty one, then it quits. I suspect the issue is related to the amount of bytes I'm reading from card.raw, but I can't be sure. I tried moving ...
- 67
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2
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203
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pset1 mario Initializing for loop from GetInt
I'm running the Mario program and I have everything working except the correct count, which I can fix. The only issue I'm having is a syntactical one. I'm tying to initialize the "for loop" with the ...
0
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1
answer
43
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Clarification regarding for loops and arrays
In the continued lecture of week2:
At about 17:00 he writes the for loop. What does i stand for? I don't think it is age, but it can't be the number of students? What does it mean?
What is ages[i]? ...
- 76