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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56 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 ...
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0answers
12 views
fix ms compiler c code to compile in gcc [on hold]
Hello, I have some very basic understanding of c/c++ language after reading one c and one c++ book to about a half each for over 15 years ago.
Around that time also, in 1998-9ish, I've bought a book ...
5
votes
2answers
226 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
17 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 ...
0
votes
0answers
44 views
Removing an internal node from a complete Binary Tree [on hold]
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 with the then ...
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votes
0answers
9 views
A code to evaluate what date it will be after n days [on hold]
I've been trying to implement a program that, given a date \$a\$ and a integer \$n\$, returns the date \$b\$ which is \$n\$ days after \$a\$.
For example, if \$a\$ 3/4/2015 and \$n=2\$, we should get ...
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3answers
83 views
3
votes
2answers
32 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
22 views
5
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1answer
62 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
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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
votes
2answers
36 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 ...
1
vote
0answers
13 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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0answers
10 views
The following code should Blink an LED as a function of an input frequency [closed]
I wrote a code to blink an LED using PIC 16F17889. It compiles using MPLAB X but nothing happens on my board. I set the frequency to some value to test it but the LED doesn't blink at all. I dont know ...
5
votes
2answers
142 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
votes
1answer
39 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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8
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0answers
55 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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1
vote
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 ...
5
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4answers
477 views
2
votes
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
36 views
2
votes
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
35 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
32 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
46 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 ...
1
vote
2answers
43 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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votes
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
37 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
36 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). ...
1
vote
1answer
47 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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1
vote
1answer
50 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
60 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
44 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
45 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
38 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
votes
1answer
27 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 ...
3
votes
2answers
46 views
Rapid color replacement for in-memory BMP
A function that relatively quick replaces one color with another, in a memory-buffered BMP.
I am trying to improve the performance as much as it is possible. The previous implementation of this ...
3
votes
2answers
50 views
Functional-style linked list written in C
For my Operating Systems class, I needed a linked list data structure and didn't have one already written. During the course of thinking about how to implement a linked list again (it had been a ...
4
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1answer
24 views
Simple file locking wrapper command in C
A simple command that wraps another command, locking a file first. It is similar to flock, just simpler.
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2answers
54 views
Small library for logging to MySQL
I've thrown together a utility for my programs to log to a database, but the code looks like a mess and I don't know how to clean it up. This library is going to be used from all of my other programs ...
4
votes
0answers
93 views
malloc(), free(), realloc() using brk() and sbrk()
I recoded malloc() by using brk() and sbrk(). I just want some "reviews" to see if it is ...
3
votes
1answer
33 views
Variable to byte decaying function
A function that prints out the values of each of the bytes of a variable, which value is given from stdin.
Consists of size detector and a loop.
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7
votes
3answers
450 views
RPN calculator in C
I had to write a RPN calculator in C as one of my homework problems, but if someone could critique my code and suggest any improvements, that would be fantastic! I haven't added any overflow errors or ...
6
votes
3answers
238 views
Reading, echoing, and returning integers in an array
I was wanting some clarification on my code, as I am new to pointers in C. I am trying to return an array from a simple function just so I can understand exactly what it is that I'm doing.
Here is ...
9
votes
1answer
127 views
Reading, processing and counting an array setting limits
Last weekend my teacher asked me to create code to solve a problem:
Giving a dynamic array, we want to pass the array elements from a file. The first number in the file N gives us the array ...
6
votes
2answers
84 views
Gauss elimination
The gauss function takes 3 parameters:
a pointer to the matrix of coefficients
the number of variables
a pointer to matrix of solution
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6
votes
3answers
381 views
Harvard CS50 Problem Set 1: greedy change-making algorithm
The goal of this code is to take dollar or cents input from the user and give out minimum number of coins needed to pay that between quarters, dimes, nickels and pennies. If this code can be ...
14
votes
1answer
90 views
Coroutines in C
Please have a look at this little coroutines library ccoro: http://sam.nipl.net/code/ccoro
I'd appreciate a general code and style review, and your kind comments!
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8
votes
2answers
78 views
FizzBuzz Challenge
This bit of code is a small game to see how long you play a game of FizzBuzz without messing up.
Code:
The top of the code:
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2
votes
1answer
58 views
Hash table with double hashing
I writing a hash table with double hashing. This code works ONLY with ASCII text files and finding the number of occurrences of each word in input file! Please point out mistakes and shortcomings.
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