19,876 Topics
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| | hi i want to know how exactly can i use time.h and rand() if i want to print every time a pair of numbers but the same pair will be printed only once for example: 2 2 2 3 1 4 3 5 2 2<----- not to happen(instead get a … |
| | Hey guys. I have a two part homework assignment. It involves reading a text file, creating a structure, and writing the results into a new text file. I have completed the first program and according to my TA it is 100%. My issue is I ran into a mental block … |
| | I'm new to C Programming ( 6th week of an 8 week course ) and I am working on user defined structures. I have created a structure to store data received from a file and three of the four sub functions planned: open the file, store the data in the … |
| | I'm trying to print an array of 3x3 and placing random numbers within them that has no repetition. I think what I did was right but there just isn't any output. I know I can easily get the answer somewhere but I would like to know what is wrong with … |
| | here's my question: write a program that asks the user to type the value of N and writes this picture : N=1 * N=2 ** * N=3 *** ** * here's my work: [code=c]#include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]) { int numOfStars = 0; int count = … |
| | Sir/Maam, I am a newbie programmer in C and learning C since 6 months and am looking forward to learn Socket programming in C . I have some knowledge about TCP/IP and OSI model. Please suggest me some simple links and ebooks . Thanks. |
| | The number I'm looking for is valid when it's positive, and nine digits. I used ( (value >= 100000000) && (value <= 999999999) ) first, which worked okay, but did not account for leading zeroes. How do I validate a nine digit number, using only math and no functions, with … |
| | Hi, Although I have done a reasonable amount of coding I have very little training (self taught) so apologies if this is a stupid question. I have written a basic Defect Management app which allows developers to create a release and assign defects to it. The release object has the …  |
| | What stupid basic thing am I missing? we are to read in from a file that contains 10 lines.....name, age, etc....I can read in the file ok and print out the first line....I am having problems printing subsequent lines....HELP!! lol [CODE]//Acme Personel Report //by PAtrick Nealey #include <iostream> #include <iomanip> … |
| | /*Hello, I am to create a program that gets a character and if it is uppercase, convert it to lowercase, if it is numeric print an error. I wrote the following code but my problem is that when I ask the user if he/she would like to quit, and I …  |
| | hello there everyone!! is there anyone who can help me to start creating an operating system. i don't have any idea on to start. i understand c language, but i dont have enough knowledge for such process. all i need is the simple concept or the simple/basic code for creating … |
| | for the zigbee in c language, after i sent the data to router, what coding can i use to get the node id or node address of end device? anyone know the answer?? pls sent to my hotmail.. thk [I]<<snip>>[/I] |
| | [CODE]#include <stdlib.h> #include <stdio.h> #include <time.h> #define MAX_ROWS 10 #define MAX_COLS 10 void sin1(char *map); int main(void) { system("chcp 1253 >nul "); FILE *fileptr; char myColchar,apantisi,map[MAX_ROWS][MAX_COLS]; int apotelesma,myColnum=1,myrow=1,k,a,l,c,row, col; char r,fileRow[MAX_COLS + 2]; // account for newline and NULL printf("dose tin diataksi me ton arithmo pou epithymeis(1/2): \n"); scanf("%d",&k);//edo tha … |
| | Good day DaniWeb experts. This is my first post here and hope you can help me with my problem. I'm a noob with Borand C++. I see a tutorial here "[url=http://www.dreamincode.net/forums/showtopic37428.htm]Converting and Evaluating Infix, Postfix and Prefix Expressions in C[/url]". I copied the code and run it in my Borland … |
| | Im having a few problems with completeing a adress book program in c (not c++ jus regular c), it requires a minimun of 5 functions so i have decided to use add, search, veiw now in order to complete i wud like to keep the add function but make a … |
 | how to print the min value from an array ? i just understand the logic of printing max value, i tried so much to print the min but didn't find any clue... here is the program for max value: [CODE] int main(void) { int num[5]; int i,max=0; for (i=0;i<5;i++) { … |
| | I have some data in the memory which is pointed to by a pointer (ptr2data), how do i pass this data to a function which accepts unsigned long/DWORD data types? [code] unsigned long* ptr2data; DWORD temp; ptr2data = (unsigned long*)&SomeArrayOfData[4]; temp = (DWORD) tempSerNum; AddDevice(7, temp); [/code] The above code … |
| | Hi everyone, I'm trying to code a program that uses RSA to encrypt your message. I assume you know it but if you don't know let me explain simply: [QUOTE]Your enter a word (actually it is a sentence but for now a word) then program will convert letters to numbers … |
| | Please see this program: [CODE]float area(float); void main(void) { float radius; printf ("Enter Radius"); scanf ("%d",&radius); printf ("Area is %f",area(radius)); } float area (float rad) { return (4*3.142*rad*rad); }[/CODE] please explain the above program, there no value has been assigned for [iCODE]rad[/iCODE] then what does it mean ? why it …  |
| | [Linker error] undefined reference to `__cpu_features_init' comes to [CODE]#include <stdio.h> int main(){ char c; printf("Hello World!"); scanf("%c", &c); } [/CODE] I don't think that it's code problem. What can I do? (Dev C++ newest version) (I tried reinstalling DEV C++) |
| | As you see at below I used "-1" as my sentinel value but my program wants the other 6 values i asked for in scanf too. How can i solve this problem? I just want the user to enter -1 and exit my loop. I would greatly appreciate for your … |
| | Hello, there. I'm trying to write a program which reads student information from keyboard and does some calculations. I've just started it and I dont know much about this "Struct" topic. As far as I know, I've tried to do something and here is the result. [CODE]#include <stdio.h> #define N … |
| | Hi Im new to this comunity and Im in throuble with C heheh. My problem is that: Im using LUA to create scripting capabilities do my software in C. So, I ve created a file called script.c to suport all script code of my project. See: [B]script.c [/B](some lines) [code] … |
| | Need help for simple program, don't have a clue about C. Please, can you help me? I have 3 errors - Undefined symbol i - Undefined symbol y and - Compound statement missing See the program bellow: [CODE]#include<stdio.h> #include<conio.h> #include <math.h> void main( ) { float a, b, c,x3; float … |
| | I have 3 files. variables.h, variables.c, and dictionary_test.c. How would I use my variables.c to get information from variables.h and dictionary_test.c? I'm not supposed to touch the variables.h and dictionary_test.c. I gotta do all the work in variables.c. This is the variables.h. [CODE]#define MAX_VARIABLE_LENGTH 15 /* Set the variable with … |
| | how do i get the child id without calling wait? is there a way to put wait information back so another waitpid can get it...? [CODE] void sigchld_handler(int signo) { pid_t p = wait(NULL); ... } [/CODE]  |
| | I have this error, " lvalue required as left operand of assignment," for line 10 where scanf command appears. I can't figure out a solution to it. [CODE]#include <stdio.h> int main() { int start; char delay; printf("We're close to blast off.\n"); printf("countdown initiated"); scanf=("%d", &start); do { printf("T minus %d … |
| | I am writing a simple code in c to extract the values from string for ex-P23V32 gives me output of 23*32. But when I am trying to use the isalpha() and isdigit() to check whether the value is a charecter or a digit, the compiler return always zero. Here is … |
| | Ok I've spent more time than you would believe on this one. I built the program, started from scratch. Over the course of the last week I've spent no shit about 30 hours on this and still cant get it to work right. What is suppose to happen is the … |
 | Hey Im doing a loop with somthing similar to this: [code=C] char stn[25]; do { printf ("Insert a number:\n"); gets(stn); }while (stn!="123"); if (str=="123") { printf ("Good value!"); } [/code] Now if I input 123, it enters the if that prints "Good value!" and the program ends naturally. Now if … |
| | HTML files use tags enclosed in angle brackets to denote formatting instructions. For example, <B> indicates bold and <I> indicates italic. If a web browser is displaying an HTML document that contain < or >, it may mistake these symbols for tags. This is a common problem with C++ files, … |
| | Hi to all, I have a problem and can't understand why this happen... I'll explain all now. I'm not a very good programmer, I'm just starting and I'm doing a program that must run on linux like a daemon. The job of this program is to take all the characters … |
| | hi... 'm findin it difficult to access system date in a c program.. pls help me... N also to write code fo airline reservation in c... |
| | Hi, I have been working on a Reversi/Othello game using QT and have got stuck when trying to implement a new game function which will return the game state back to its original state. reversigame.cpp [CODE]/** @file reversigame.cpp @author Rob Charrett @brief ReversiGame implementation. */ #include "reversigame.h" ReversiGame::ReversiGame(QWidget *parent, Qt::WFlags … |
| | Hi, Im a novice and im implementing a mp3 player. Im using the concept of doubley linked list for moving between songs in the directory... I have enclosed the code also.. the error i get is next_previous.c:80: warning: assignment makes integer from pointer without a cast next_previous.c:81: warning: initialization makes …  |
| | Hello All... To be honest, this is a bit overwhelming, but I'm hoping that someone might be able to steer me in the right direction. I am currently taking a correspondence course in Computer Programming, and without instructional support, am finding that the material can be somewhat overwhelming. I'm looking … |
| | I need to create my own function to compute the cos of an angle (given in radians) using the Taylor series. The task is to create a function in which a float value is passed to it, and a double gets returned. My program compiled, but I am getting wrong … |
| | I am new to programming and i am teaching myself. (my teachers are not very good) I am attempting an old assignment that a colleage had completed in school. He told me it was pretty basic in terms of c++ programming. UELS is a company selling bicycles; Customers may opt …  |
| | Hello, So my problem is that I am supposed to write code in order to prove whether or not text in a file is topologically sorted correctly. I have the algorithm on how to do this, but the specifications say that I should use an array of lists to keep … |
| | The code below is for my assignment it works i just want to make sure i did this correct any advice is wanted. Also one thing that is bugging me see basepay well if the base pay is 133.20 it chops off the 0 and only displays 133.2 why iv … |
| | Hi we have a buffer say [COLOR="Red"]char array.[1].[/COLOR]so the size will be 1 byte. Now our problem is say we have 8 bits data say 10110101. now this must be assigned to array[0] variable as 1 byte. bit manipulation is not happening.kindly help us in this regard If possible post … |
| | I'm trying to create a maze with a mouse inside moving up down left right in 200 moves. I've got everything working besides the fact that it duplicates the heart on the other side(If it exits on the left, it'll be duplicated at the right end) when the heart shape(mouse) … |
| | Hello this is my first thread on the forum i tried to search everywhere for a solution but no result...:'( Im trying to figure out some easy pointer use but still get some stupid error... My fault. error C2440: '=' : cannot convert from 'char (*)[100]' to 'char' [CODE] void …  |
| | hi, Question 1 i am developing a project in C#.Net, and when a form loads data from the SQL client database is added to four combo boxes in the form, i need to change the data in the combo box when the check box is ticked. I wrote a code …  |
| | Hi! (This is my first post on the forum) I'm trying to capture the desktop of the "not showing" desktop. I got two users, both logged in. I start the program on the first users desktop (to capture), and then the second one on the other user, which is supposed … |
 | I have this program where I'm trying to find the file size with the boost library. I find the files fine, but it won't get the file's size, where am I wrong? Thanx for your help... Here's my code so far. It compiles fine, but won't return the file size. … |
| | hello everyone, i have been given a task in my class to create a student database. it has to be able to allow a user to enter a class code, class name and a linked list of students enrolled in the class. the struct we have been given to use …  |
| | I am getting unpredictable behaviour from malloc(). Here is the code fragment: [code=c] float **t; t=(float **)malloc(sizeof(float *)*A); perror("\nError status 1:"); for(i=0;i<600;i++) { t[i]=malloc(sizeof(float)*B); } perror("\nError Status 2:"); [/code] The objective here is to have a dynamic 2D float type array. For testing purposes though, I have hard coded the … |
| | [CODE] using namespace std; int main(int argc, char *argv[]) { int item_weight; // ITEM WEIGHT IN GRAMS double item_unit_price; //ITEM UNIT PRICE ($) int quantity_required; // QUANTITY REQUIRED //ENTER ITEM WEIGHT IN GRAMS----------------------------------------------------- cout << "ENTER ITEM WEIGHT IN GRAMS: "; // prompt for input item_weight cin >> item_weight; // … |
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