18,490 Topics
Hello, I´ve got a question about multiplexing 7 segment displays. I already have working 1 7 segment display. How can I control more 7 segment displays? Now only the 3th display can be controlled. This is the code I've made: #include <avr/io.h> #include <util/delay.h> #define F_CPU void delay_ms(uint16_t); void digit …
I wrote a short piece of code to give me a .dat file for use in another program. But i cant figure out what is wrong. I run on a mac, and use Xcode. [CODE]#include <stdio.h> #define ARRAYSIZE 1500 #define BINDATA "file://localhost/Users/Hub/Desktop/231A4binData.dat" int main (void) { int i; double dblData[ARRAYSIZE]; …
Hi, Can anyone explain in detail what is the difference between int *a and int* a? Is there any difference between them?
Hello, I have a program that is like a ftp server - it sends and receives files over unix sockets. It works fine when I transfer text files, but as soon as I want to receive binary files, it's not working properly. Files are transferred correctly, I can verify that …
Hi what methods of encryption could I use to encrypt a text document. It must use C and not C++. Cheers Sam
I am working on some image processing ideas and I want to implement them using pthreads. Here is an example I came up with just to make sure that the threads were actually doing what they were supposed to be doing. It just increments the values in an array and …
i know there is probably a trick for this in C that i do not know, but i attempted to write my own function for finding the mode of an array of data (As large as 1500 doubles). Heres my crack at it. [CODE]void mode (double * array, int numItems) …
i need help with the 5th case in the submenu! Several 2-dimensional geometric shapes, area, and a program for environmental accounts are required to be made. To do this, first run the program in a main menu displayed on the screen as follows: MAIN MENU 1. Area Calculation 2. Perimeter …
Hello, I´ve got a question about multiplexing 7 segment displays. I already have working 1 7 segment display. How can I control more 7 segment displays? Now only the 3th display can be controlled. This is the code I've made: #include <avr/io.h> #include <util/delay.h> #define F_CPU void delay_ms(uint16_t); void digit …
Hello everyone i'm new to this kind of things plz help me to solve this , if anyone can post the c/c++ code also i shall be thankfull to you :) An eccentric doctor visits his patients in order of decreasing age. Patients entering the waiting list specify not only …
On this link [url]http://lxr.ncu.cc/source/kernel/timer.c#094[/url] a return type is defined [CODE] return ((unsigned int)(unsigned long)base & TBASE_DEFERRABLE_FLAG); [/CODE] What is the above function returning.I am not clear with definition of what is being returned in the above code.
Write a 'C' Function to combine two singly connected linked lists in the following manner. Suppose one list is "L" which can be given by L=(l0,l1,.....,lm) and the other list is "M" where "M" can be expressed as M=(m0,m1,......,mn) where each li,mi represents one node in the respective lists. For …
someone please help me with printing out body parts... read in word from list..user inputs letter.when correct letter is place on line..else ..im stuck here..cannot print out body part when input is wrong.. [CODE]#include <iostream> #include <fstream> #include <iomanip> #include <string> #include <ctime> using namespace std; void pickword (); int …
Hi All, Can somebody explain what is the difference between (char*) and (char**). I am just looking for an explanation of in byte level. Also please refer any documents related to this. Thanks
im a first year engg student. i need 2 make a report on cryptography and i need the source code in C for caeser cipher. as it so happens im not very good at c programming... please help can u tell me wats wrong wid this program? #include <stdio.h> void …
so i just started this programming class in school today, im having alot of trouble, i dont want everyone to do the work for me, but i would love for you guys to tell me what needs to be done, i know this is alot to ask so if anyone …
Hi, I would like to make an threaded app which would use pthreads. I made a linked list and I put references to running threads here. I know that operations of adding a new thread reference to the list and removing a thread reference from the list after the thread …
Hello, I want to redirect stdin and stdout of "cat" program to my program. For example if I type "cat" in terminal, and enter input and press enter it outputs the same string I entered. In my c program I am trying to use pipes and dup. I cannot figure …
Hello all, I have this code: [code=c] void SetMatrixRange(MyMatrix * matrix, int xfirst, int xlast, int yfirst, int ylast, int zfirst, int zlast, int value) { int i,j,k; for(i=xfirst;i<=xlast;i++) for(j=yfirst;j<=ylast;j++) for(k=zfirst;k<=zlast;k++) matrix->m[(i*ylast*zlast)+(j*zlast)+k]=value; } [/code] I allocated the matrix like this: [code=c] MyMatrix * CreateMyMatrix(int x, int y, int z) { …
Hi! i trying to take the same value from 2 arrays and then count how many time of it. However, when i compile, it run ok. but it did not print out the value of coutting. I did not know why, i had tried several times to fixing. please help …
hi everyone, i'm trying to do a program in c, GCC UNIX and i have this error: warning: passing argument 2 of `write` makes pointer from integer without a cast i try to use TUBE, communication between process and i use `write(fd[1],2,1);` but it gives this error please i nead …
I absolutely hate hate hate hate HATE to be doing this, because I've figured out every other program I've done relatively alone with my C Book. I'm writing a program that declares an array of structs, each with a name and age field. The data is read from a file …
The program I am writing is supposed to read in a txt file and then align the txt depending on the number of characters per line that the user has specified. Since there aren't any limitations to the length of the text it has to be represented using a dynamic …
Dear all, Im trying to do a matrix multiplication with complex number. I have 2 structures: [code=c] /* Structures */ typedef struct complex { // Complex structure = real and imaginary part. double re; double im; } Complex; typedef struct complex_matrix { int rows; int cols; Complex **mat; } Complex_Matrix; …
Hi all, I am trying to read a file in C. The format of file is something like that : ----------------------------- <From: [email][email protected][/email]> Hellooooooooo. </from> <From: [email][email protected][/email]> What am I doing? nOwwwwwwwwwwwwww </from> ---------------------------- I would like to read the file and extract some info like number of emails , …
Hello, I'm working on an inventory program in c and having a lot of trouble with it. I've compared my code to several examples in the book and it seems right but I'm having these problems: 1. When I try to list the tools, the program ignores the command and …
Hi, I am writing a code that reads input from user to create a linked list database at the same, time it write the data received in to binary file. when I run the program is supposed to prompt the user to enter the data for ten time, however the …
Hi, Is there anyone who know which complexity these functions are? I mean O(n), O(n^2), O(n^3), n log(n) or log(n) 1. --------------------------------------------- [CODE]void bogosort_array(double a[], int length) { do shuffle_array(a, length); while (! is_array_sorted(a, length)); }[/CODE] 2. --------------------------------------------- [CODE]void reverse_string(char* s) { int n = strlen(s); for (int i = …
Whats wrong with this code. I can create the DAT file.Name and Grade is writing to the file perfectly. but the file contains ASCII values for RollNO and after Grade. [B]Output file:[/B] Name A ÈB [B]Program[/B]: #include<iostream.h> #include<conio.h> #include<fstream.h> #include<string.h> class stu { int rollno; char name[20]; char grade; float …
I am writing a program that will take a sentence and find out how many of one character (like how many h's) is in the sentence. I have started what I think works and got the program to work once but after the one time I cant get it to …
Hi, I'm a BSD Socket beginner and I would like to make a small networking program written in C. I've read many instructional articles and I haven't found a example how to send/receive a non-char - string sending everywhere. I mean, I thought about sending some various structures as "frames". …
Basically I've finished my code for the most part and I'm having trouble figuring out how to initialize loan, mort_gage, and downpayment. Is it possible to use a pointer for each of these and call the address back to main? I'm so confused...it's just one of those little things that's …
I was writing a file copying program. Mind you this is an any file copier. That is, at this moment, this function can copy only text files but i'm trying to copy mp3 files, avi files, mkv files etc, which this cannot. Here is just the copying function. However it …
Hello, I've to make a c program with the next specs: Write a function that is specified as follows: bool lees_file (char *, int [] [KOLOMMEN_IN]); The function has as parameters a pointer to a file name and a two dimensional integer array and a return value of type boolean. …
Hi, I found an exercise about memories in a site but I don't understand the solution. The exercise says : A word in a little-endian pc has value 3. If I transfer this value in big indian byte per byte what is the new value ? The answer is 2*(2^24). …
How can I create a code for this task? *You are given a natural number m and natural number n =2, .,.,.. 16. Print the number m in counting system with base n.
Hello, I'm trying to take a C array of char's and trying to take all of the spaces out of it. Yet I keep running into a segmentation fault. Can anyone help me here? [code] #include <stdio.h> #include <stdlib.h> int strlen(char* Str) { int toret=0; int i=0; char tmp = …
there have problems with the output and the calculation... [CODE]void Mark_Attendance() { int answer, temp_Att; FILE *ExistingFile, *AppendingFile, *ReadFile; ExistingFile = fopen("Attendance.txt", "w+"); AppendingFile = fopen("Attendance.txt", "a"); ReadFile = fopen("StudentDetails.txt", "r"); if(!ExistingFile || !AppendingFile || !ReadFile) { system("cls"); printf("This File Cannot Be Open Successfully!!\n"); printf("Please Check It!!\n"); exit(-1); } else …
Hi All, i want to know what is the use of const volatile variable, where exactly it is required to use.
Hello, We are trying to control 8 7-segment displays by using multiplexing. The problem we have is that we have to program buttons, how can we make it? Best regards, Floris /* Ansteuerung von drei 7-Segmentanzeige im Multiplexbetrieb * Gemeinsame Anode, PB0..PB6 * Spalten: PC0..PC2 * * a * f …
Okay heres the background on the code. I've written a code that prints a 10x10 array or random numbers. Then prompts the user to pick a number. After user picks a number, the program then tells user the number of times number was found in the array and supossed to …
i need a help in airline reservation system project in c n i dont no how to do that so plz tell me the codes for these we should allow the user to chose 1)to book 2)to cancel 3)view data 4)quit as well as they have to enter them name …
Hey all, I'm trying to implement a function InitMatrix which suppose to return a pointer to a new created 3d array of the size determined by x,y and z. I have a struct which represents a matrix and should be able to deal with some functions required, like setting the …
Hi i ve been dealing with a program and encountred a weird problem. the problem is that my array variable por[27][1]'s value changes for no reason. please take a look at the pictures in the attachment. the pictures belong to debugging.
Hello, I have an assignment where we are supposed to populate an operating system's ready queue with processes and try various process scheduling scheme and record their wait times. To do this i made a rudimentary structure for a process: [CODE]typedef struct{ int ID; int wait_time; int exec_time; }process; [/CODE] …
hello, i need a tool to measure the cyclomatic complexity of a given C source file. what do you suggest for this? thanks..
Salam, My mission is to program a cube[I](given its dimensions (x,y,z))[/I]. The cube will be represented in a struct, which I'll choose what data members it should contain. I need to implement the allocation function(which actually creates the matrix) and some other functions. The most important function is the setter …
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