C is a general-purpose computer programming language used for operating systems, games and other high performance work and is clearly distinct from C++. It was developed in 1972 by Dennis Ritchie for use with the Unix operating system.
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4answers
50 views
Implementing Caeser Cipher in C
I am trying to implement a "Caeser cipher" to every lower case character in a string, by using a number to control the amount of character rotation. Here is an algorithm that I came up with, can you ...
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0answers
9 views
Windows AppLocker extension - Owner rule
I am trying to extend Windows AppLocker behavior to add custom rule which checks owner of executables in Program Files and Windows folders. This would help us patch folders that are writable by ...
3
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3answers
29 views
Reserving seats in a movie theater
I'm writing a C program to reserve seats in a movie theater. I am validating the selection of seats:
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2
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1answer
30 views
Kernel development
I'm trying to learn more about kernels, so naturally I started to program one. I'm using tutorials from here. Right now I have modified the printf() that was ...
2
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1answer
66 views
Binary Search Tree in C
I have implemented a BST from scratch. My aim is to draft better code and understand some pitfalls which I may have overlooked.
It includes the following functionalities:
Insert a new item.
Find ...
4
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1answer
103 views
Arduino code powering horoscope generator
This code works, in the same way that a cardboard bicycle works until you cycle through a puddle. It powers a box that plays a sound file in sync with some lights on movement detected by a PIR sensor. ...
6
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2answers
47 views
Extracting information from a URI
I'm completely new to C and my first project is to create a simple cURL-like HTTP request client... but first, I need to create a function that can parse a URL. I've created this function, and it ...
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0answers
16 views
Switch case for menu of pay rates [closed]
I am trying to make a program that prompts the user a menu of options like this
...
5
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1answer
49 views
Wormhole - a Windows shim app written in C with no stdlib
My application compiles and seems to work correctly, but this is my first C project so I welcome any criticism. I developed this in Pelles C with no standard lib. Efficiency and optimizations are more ...
2
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1answer
50 views
Printing calculator - Stephen Kochan exercise
I'm a newbie at programming, just one month into C. Working with Stephen Kochan's programming in C. There is a question in chapter 6 to write a printing calculator where 's' tells the program to set ...
3
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2answers
131 views
Delete an item from a linked list
I wrote this code to delete an item from a linked list. I checked it and it works, but I want to know if the logic could be written simpler or clearer.
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4
votes
1answer
41 views
Anatomy of a string-reversal program with less coupling
I'm currently trying to improve my C understanding. Would you mind telling me if there are good/bad things that I did here? (I implemented a function to reverse a string in place).
For example things ...
6
votes
1answer
68 views
A BrainF*ck-ish compiler in C
-ish because I removed the input functionality from the compiler. And, the compiler does not support nested loops
I've been recently reading up on compilers and how they work.
Although this doesn't ...
3
votes
1answer
45 views
Remove odd valued nodes from linked list
The function remove_odd is to remove odd valued nodes (surprise!!) from the linked list head. The code is very long and cryptic but it seems to work.
Please help ...
2
votes
1answer
26 views
C function delimiates strings using a single character array
I am a complete noob to C and I've shied away from using such a powerful language due to it's large learning curve and other complicated mechanisms. For my first minor project I plan to create a small ...
2
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4answers
48 views
A function that reverses a string of characters
My problem is in writing a function reverse(s) that reverses the character string s, a line at a time. My code here works, I ...
5
votes
1answer
81 views
Brainf*** Interpreter in C
I posted a question on StackOverflow regarding this program. I ended up pretty much rewriting everything to get what is posted here. This turned into a two-day long project. I've been using Python for ...
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1answer
291 views
Number of interesting numbers between two given numbers
Please have a look into this problem:
Little Dipu is a small kid and like all the other kids, he likes to
play, but he plays with numbers (he is extraordinary you know).
Nowadays Dipu has some ...
7
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3answers
251 views
Keeping integer addition within bounds
I have to read a int8_t from a buffer, read a uint8_t from the camera's current settings, add them together, keep new value ...
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1answer
22 views
Copy memory blocks of different sizes
Is there a better way than this to copy the values from source to destination when the blocks of memory you want to copy to and from are different sizes? Also considering you have no control over ...
2
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1answer
84 views
Constructing and maintaining a complete binary tree
Problem statement:
Create and maintain a Complete Binary Tree in C. Include the following
operations.
Insert a given key and perform inorder
Replace ALL occurrences of the given key ...
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4answers
106 views
3
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2answers
38 views
Program to evaluate powers of complex numbers
I'm trying to develop a simple program to evaluate integral powers of a complex number \$z\$ , that is, \$z^n\$, where \$z\$ is in the algebrical form \$a+i b\$ and \$n \in \mathbb{Z} ^{*} _{+}\$.
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0answers
27 views
5
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1answer
66 views
“Laser treatment” SPOJ challenge
I am trying to solve this problem on SPOJ Brazil. I'm trying to approach the problem with a series of logical conditions and my code looks like this and it works perfectly.
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2
votes
1answer
45 views
Readers-Writers problem in C
I would love some suggestions on this code of mine, pointers on overall design, code quality, optimization in terms of memory and speed.
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3
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2answers
39 views
Converting from base-10 to word
The following code is used to convert a base-10 number to a base-N number, where N is a length of a given alphabet that contains characters of which a base-N number ...
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0answers
15 views
Entering base characters one-by-one for a List [closed]
This function should prompt the user to enter bases characters (a, g, c and t) one-by-one and then insert them in the List.
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5
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2answers
149 views
Edge cases for simulated malloc function
I'm trying to simulate the malloc function in C by using mmap and having 2 linked lists to act as memory blocks. The program ...
2
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1answer
44 views
Array-based FIFO queue in C
I have this "generic" implementation of an array-based FIFO-queue. As I have written very little code in C, I don't have an idea what to ask, so feel free to tell anything that comes to mind.
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2answers
82 views
HTML/XHTML/XML tokenization
I want to write a library to parse any valid or invalid HTML-like things. First of all, I am trying to build a lexer. Here is what I did;
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1answer
43 views
Minimum sum of numbers
The code reads an input with numbers and find the sum with the minimum difference of the first two big numbers. The sums are three.
Is there is any way to make the code cleaner? (Note that I don't ...
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votes
4answers
496 views
2
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1answer
26 views
Printing simple histogram horizontally
I am new to programming and want to know if this is really bad code. I know my variable names may seem arbitrary but I spent some time trying to get them right. I am struggling on that. Would you do ...
2
votes
1answer
38 views
2
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1answer
23 views
Can I be checking that buttons are pushed in a better way?
I made a panel of buttons which run commands when pushed. In order to not have the command run on every loop if the button is held down, I am comparing the button to a previous state and only run if ...
3
votes
1answer
36 views
Reading a file into memory
Can you review below code for performance and stability considerations? It is supposed to take a filename or NULL. If it is a filename, read given file into memory. ...
3
votes
1answer
36 views
Blinking LED code at a particular frequency [closed]
I wrote a function for interacting with my PIC16F1788. The code sends pulses out the RC4 port at a specific frequency, to make ...
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votes
1answer
55 views
Optimizing Diwali Lights problem in C
I was trying to solve the Diwali Lights challenge on HackerRank.
Problem Statement
On the eve of Diwali, Hari is decorating his house with a serial light
bulb set. The serial light bulb set ...
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2answers
44 views
Optimizing the runtime of the bisection method
For those who aren't familiar with the bisection method for finding the root of a function (i.e. finding where \$f(x) = 0\$) the basic idea is:
take a function \$f(x)\$ and an interval \$[a,b]\$
if ...
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1answer
20 views
Moving between two angles in a set amount of time [closed]
I need to slowly change from one angle to another angle over a certain amount of time, using the shortest path between them. I have a function that accepts four parameters — the start and end angles ...
3
votes
1answer
40 views
Dynamic array implementation
I would like to use code below for general purpose dynamic array implementation in my future code. How does it look?
array.h:
...
2
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1answer
37 views
Implementing dirpath(3p) and fdirpath(3p) functions
I'm implementing a dirpath and fdirpath functions, which allow to retrieve path from the directory handle (or its descriptor). ...
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1answer
50 views
Data structure for inserting and replacing data in list
I have a list of key value pairs, that is used as an intermediate store for building URL parameters or JSON data. Currently this is done with a linked list:
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1answer
53 views
ROT13 algorithm in C
I am trying to learn C and I came across the ROT13 scrambling system used to store some passwords.
Assuming the user types everything in correctly (uses 1 argument, uses a string not an int, etc.) ...
2
votes
2answers
61 views
Prime factors of a number in C
The following is code on "prime factors of a number". Any suggestions to optimize the code? It runs for a pretty long time for inputs like 35068499. I also want the code to take 10 digit numbers as ...
7
votes
1answer
46 views
Restrictive stupid shell
I'm attempting to create a replacement shell for /bin/bash, that only permits commands defined by a read only config file. These commands will be run by absolute paths, and take no arguments. I'm not ...
2
votes
1answer
53 views
HackerEarth Crazy kangaroo challenge
I want to find the lowest hop count from source to destination.
The challenge, in summary:
The first line contains the number of test cases T, 1 ≤ T ≤ 100000.
The next T lines each contains ...
3
votes
1answer
39 views
Network byte order to host byte order
While doing a little project involving sniffing packets, I found myself programming a cross platform network to host byte order and host to network byte order, this is my first time developing a ...
4
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1answer
28 views
K&R Exercise 1-20: tabs to spaces
I'm learning C with K&R 2nd Ed. I've just completed the exercise 1-20 and I would know if my code is correct (i.e. answering the question) and if my style is not too bad. Or just some feebacks to ...
