[c] Forum Topics

Hi! I'm working on a hobby OS. Almost every time I try to link my files I get a 'undefined reference to' error. As I've been trying to compile with different compilers, the errors generated by the linker changes. I have only been using different ports of the GNU compilers. …

Hi guys i have this code for multicast with encryption and decryption with DES(shared key) i think encryption goes ok but decryption not working and i can't find the problem both codes compiles fine without problem when i execute them encryption works but decryption not PLS HELP ME!!!... here is …

I need to copy modified data that is stored in an char* to another char* but I get an access violation error. Here is the code int EncryptData(char *data_source, char *data_cipher, size_t sizeofdata) { char *tmp_data; long long int digit; tmp_data = new char[sizeofdata]; /* Do some calculations here with …

Dear Friends, I am Anes , doing M.Tech in Cyber Security. As part of our syllabus lab program in "Information Security Lab" we have an experiment "**Implementation of proxy based security protocols in C or C++ with features like Confidentiality,Integrity and Authentication**" . Actually I am in dark now . …

**Question 1:** I want to create a save file for a game im creating in C++ problem is i can only use the vanilla headers in dev-cpp (which spawns another question id like to have answered/suggestions), my main problem id like to get past, is how the easiest format/way of …

Any code to take 2 ascii chars and put into 1 byte? 0x16 = ? byte

As all of you can tell from the title, I need help understanding how to communicate to a USB port. Basically I need to send some bits to a usb micro controller and to do so I need to understand how you do it in C for both a Windows …

This is an assignment given to me with the worst possible book for this class. Basically, i need this code to add the row and col of the user input. i know it is missing the row portion, but currently, the col addition is summing everything together twice and i …

That program output (the chr is not a vowel ) everytime !! even if it's vowel #include <stdio.h> #include <conio.h> int main() { char ch; printf("Input a character\n"); scanf_s("%c", &ch); switch (ch) { case 'a': case 'A': case 'e': case 'E': case 'i': case 'I': case 'o': case 'O': case …

i'm trying call the WM_DRAWITEM message from WM_KEYUP message without sucess :( bool KeyPressed(int a) { if(GetAsyncKeyState(a)) { return true; } else { return false; } } //in WM_KEYUP message if(KeyPressed(VK_MENU)==true) SendMessage(hButton, WM_DRAWITEM,NULL,NULL); what i'm doing wrong with SendMessage?

Hay guys iam new to c programming and i was trying to do simple do you want to continue loop using do while loop the problem is the program doesn't read the char Y/N and just simply contiune the loop and here is the code what's wrong #include <stdio.h> #include …

hello, could you tell me how to send ASCII control codes 8025T fagor controller eg <ENQ> and also read from the controller <DLE> character in c language. thanks

Is it possible to parse an ethernet frame to extract an ssl server certificate to determine the common name issued to?...Im not too familair with ssl records.

I have a few questions. Server-client code with a (distributed) hash table. Give the peers their own port, own node-ID, predecessor and successor ( node-ID, IP and port of them). That's a snippet of it. port= argv[1]; ownNodeID = atoi(argv[2]); sucNodeID = atoi(argv[3]); sucIP = argv[4]; sucPort = argv[5]; preNodeID …

I am working on a little hobby project, it reads user input and then stores it in a pointer to char array. The problem is that the output is not correct. So i dont know if it is the output, or the storing that is wrong. I am used to …

i read the following line from programming wiht c by byron s gottfried. **"only external and static array can be initialized"** however when i tried initialising automatic array ,the program works . please explain.

I'm working on a rolling dice program. The rules are below. I'm not sure how to **reassign** a value. For example, a value of 1 and 2, would equal 1; a value of 3 and 4, would equal 2; and a value of 5 and 6, would equal 3. The …

Hi, just to find out if any of you gurus have been coding in C in a UNIX environment with a Raima database? Will want to lean on someone for guidance

#include <stdio.h> void function1(void); void main () function1(); } void function1(void) { int a; int b; int c; int d; int i=0; int rooms; printf("enter number of rooms\n"); scanf("%d",&rooms); do { printf("Enter the price per meter of the tiles\n"); scanf("%d",&a); printf("Enter the length\n"); scanf("%d",&b); printf("Enter the breath\n"); scanf("%d",&c); printf("Enter the …

#include <stdio.h> #include <stdlib.h> #include <string.h> FILE *data; struct node* L = NULL; struct nodeMail* M = NULL; struct nodeNr* N = NULL; struct nodeMail { char email[20]; nodeMail* next; }; struct nodeNr { char numri[10]; nodeNr* next; }; struct node { char emri[10], mbiemri[10]; nodeMail* email=NULL; nodeNr* numri=NULL; int …

#include <stdio.h> void Merge(int *, int, int, int); void MergeSort(int *array, int left, int right) { int mid = (left + right) / 2; if (left < right) { MergeSort(array, left, mid); MergeSort(array, mid + 1, right); Merge(array, left, mid, right); } } void Merge(int *array, int left, int mid, …

Friends i have little bit problem in making a c language program. I have to make a program which prints prime numbers from 1 to 500. I make this program but with while loop then i was told to make it using for loop, which i tried but failed. So …

The program should insert a node that is a sum of next 2 nodes stdin: 2->7->4->9; stdout: 2->11->7->13->4->9; The program returns a segmentation fault,I'm not sure what seems to be the problem. void insert(Node * list){ if (list==NULL) { return; } for(; (list->next->next)!=NULL ; list=list->next){ Node* new=(Node*)malloc(sizeof(Node)); if(new == NULL) …

Is it possible to dynamically use scanf to prompt for user input ? I have the code shown below scanf("%d %d %d %d", &myarray[row][0], &myarray[row][1], &myarray[row][2], &myarray[row][3]) which works fine when the number of columns is fixed but in my case it is not !

This Project is to implement some procedures doing the following: 1. Represent any graph using these input parameters: • A parameter to represent the graph by Adjacency Matrix, or Adjacency List. • A parameter to indicate whether the graph is directed, or undirected. • A parameter to indicate whether the …

how can you write a program that returns the last integer of the inputted number from the keyboard by the user using recursion?

I have a small code utilizing a hash table. Now I want to convert it, basically, to a distributed hash table. Hoever, I can not find out how you actually code one or what changes you make to an existing hash table...??? Can anyone please help me, please? I can …

Hy to all! I have a problem, i try to write c program, where parent create two process. And first child write in console (printf()) "one" and the second one print "two". Both of them must print (printf()) their word 5 times. I don't know why don't work.. An example …

#include<iostream> using namespace std; struct node int data; node*next; }; node*head=0; void input_at_end(); void display (); void del(); int main(){ for(int i=1;i<=3;i++){ input_at_end(); display(); } del(); cout<<"\nafter deleting"<<endl; display(); } void input_at_end(){ node*temp; temp=new node; cout<<"enter data"; cin>>temp->data; temp->next=NULL; if(head==NULL){ head=temp; } else{ node*temp2; temp2=head; while(temp2->next !=NULL){ temp2=temp2->next; } temp2->next=temp; …

Hi i'm a newbie here & my questions are : 0- *what should i know to develop a library like the C standard library and if im thinking of building my own OS "im just dreaming" should i create a NEw C for it cause as we know C for …

I have a base class called Matrix which has a function transpose. I also have a derived class Matrix2 which is inherited publicly from Matrix class Matrix { public: Matrix(); ... Matrix Transpose(void); ... }; class Matrix2 : public Matrix { public: Matrix2(); ... }; In my main code, I …

Okay. This weeks 'problem' is that I need to simulate a game. I have to make two singly linked lists which will contain a name of player, his attack (double/float) number and his defence number and so on for as many players as the user inputs. The point of the …

This is my function UpdateWord. It searches for a word in the file and updates the word or the meaning void UpdateWord(void) { char srchWrd[30],choice,qtn='Y'; int x,y; dictio a, temp; FILE*ptr; do { printf("\nEnter Word to update: "); fflush(stdin); gets(srchWrd); x=strlen(srchWrd); for(y=0;y<x;y++) srchWrd[x] = tolower(srchWrd[x]); if((srchWrd[0]>='a')&&(srchWrd[0]<='i')) ptr=fopen("A-I.dat","r+b"); else if((srchWrd[0]>'i')&&(srchWrd[0]<'s')) ptr=fopen("J-R.dat","r+b"); …

Hello all!Im trying to write a program that accepts a string from users and then converts each character in the string to its corresponding 8-bit binary code and store it for further manipulation on obtained bit. I have the following code but it is not executing as expected : #include …

help with this PROGRAMM: Topic :The book of contacts Build a programm in C ,which saves in a text document the list of contacts /persons. Every contact should save an information for: 1.Name 2.Surname 3.the list of email(he can have a few addresses) 4.the list of the number of phones. …

It's a server-client code. The client should wait for the server, and if there's no response, then send a new request. There's a 2 second wait. It's UNIX. I've been looking at some select() examples, but I'm not really sure... I found this example. #include <sys/types.h> #include <sys/socket.h> #include <sys/time.h> …

plz cheak this if you dont know? >>>>>surf birthday paradox #include <iostream> using namespace std; #include <stdlib.h> #include <time.h> const int SAMPLE_SIZE = 24; const int NUMBER_OF_SETS = 1000; int Menu(int); void ExplainBirthdayParadox(); void VerifyBirthdayParadox(int Birthday[]); void SortBirthdaySet(int List[], int Last); inline void Swap(int &A, int &B); void LookForMatch(int Birthday[]); …

when we create child controls, what is the style for accept text formats? (i mean: '\t', '\n' and others)

I'm currently writing a program that can track each word appear in a paragraph. For example, if a paragraph is "I have two dogs and two cats......" my program output should be: 'I'appeared 1 time, 'have' appeared 1 time, 'two' appear 2 times ....so on So far, I have two …

how to program that allow user to search, delete existing data, insert new data, sort the data and display the data

plz can any one help me.. i need it 2night

I have a linear array of structs. These are constant structs and is a way of holding a simple table. Now though I need to add another "column" to the table (another member in the definition of the struct) and I'm wondering if I'd be better using a class rather …

What is the maximum buffer size allowed in memecpy() function in c, I am using GCC compiler,32-bit system, What is the affecting factor for memcpy failure? ->Alignment issue? ->Size? however the buffer size 256bytes not working, tried 160 bytes copy which fits our requirement

I get this error poping up here and there but I still don't know what it means and how to fix it. "Windows has triggered a breakpoint in program_name.exe. This may be due to a corruption of the heap, which indicates a bug in program_name.exe or any of the DLLs …

when i use the ownerdraw message, with button(for exemple), do i lose the button face or only the text? (i need show a text and image, without lose the button face)

hello, i am really new in C programming. This is regarding switch case. How do i limit user input in switch cases? In this case, after they input 1 or 2, i dont want them to input any other number other than 0. Im still new in loop so any …

If I want to have a datagram socket, what do I have to change here ? It's a stream socket right now. Just change it where it creates the socket ? `sockfd = socket(PF_INET,SOCK_STREAM,0);`

So i just finished my first c course, so what comes after? like i learnt how to sort arrays, import from files and change them, linked list and stacks and queues, so thats it? can't wait for the new semster to learn more, i just wanted a heads up to …

i want a program code that convert the decimal to binary numbers and vise versa, and a GUI that contain my name which is: "Hafenaaje" and my student number="120012189. the gui may contain clear, decimal, binary and exit button... please help!!!!

Am developing a c programming which contains windows.h header file and GetWindowText api functions.Now i want to run it in linux.Is there is any api in linux or is there is any possiblity to run the c programming on linux.