19,876 Topics
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| | i want to write a program which display alert message whenever 15 mins are over.But i am not finding solution of my problem using waitforexit() or delay() functions. [CODE] #include<time.h> #include<stdio.h> #include<dos.h> #include<conio.h> void main(void) { time_t timer; struct tm *tblock; time_t t; //timeout=18000; /* gets time of day */ … |
| | I am getting the following error: PII.cpp:266: error: 'struct std::string' has no member named 'getfirstblock' And I'm not sure how to fix it, since "int block" has to be equal to the firstblock of the file, how can I fix that error? Also, my "getfirstblock" function should return the block …  |
| | So I have been trying to implement piping in my own shell program so that I can actually understand what UNIX is doing. I'm very very close at the moment, but for some reason my program is going into an infinite loop when I pipe. I'm pretty sure my problem … |
 | I don't really know what to ask here because the only indication I have that there is something wrong in my program is that nothing is showing on the screen. I'm loading a .obj model (it's just a cube, and i've checked all the verts/faces and they're all proper values) … |
| | Hi all, I have this code here and I like to save all the messages into 1 text file name contimer.txt. I've tried to do [CODE] FILE *output fopen(output,"comtimer.txt", "ww"); [/CODE] right before the function Timer 1 and change every "printf" function into fprint_s(f, "Message", variables) but it does not … |
| | Hello Team i am a newbie in c#, i have was asked to come up with a program that extracts information from websites and stores in txt, or any other readable format. now i managed to do the program. my problem now is i am extracting information from a site …  |
| | I am a web developer and this is my first time doing coding for desktop program. I am looking for a software development tool to use for c++ which include GUI and be able to pack up and run on windows after I have finished written the program. This software … |
 | My question is why fstream can't read 0x1a. For example make a test file and inside it write in HEX editor 30 1A. [CODE]#include <iostream> #include <fstream> typedef unsigned long DWORD; using namespace std; fstream myfile; template <class T> T grad(T value, int step) { T val(value); if(!step) return 0; … |
 | the problem is if you increase buff size and also change the buff size in a3_fgets_2 function call to more than 15, the program will run in an infinite loop, Can anybody tell me why? Thanks [CODE]#include<unistd.h> #include<string.h> char * a3_fgets ( char * str, int num, int fd ); … |
| | Hi Friends , This is Ganeshan . I Found the Below undefined errors when using Socket programming on Eclipse IDE . I don't know what to do ?. Kindly please help me in removing the Errors . [Linker error] undefined reference to `WSAStartup@8' [Linker error] undefined reference to `socket@12' Thanks …  |
| | C# Linq to Entities - Reference.EntityKey Now that I have built a database and here is the corresponding SQL code: [url]http://www.mediafire.com/?f4a0d74j7qe7a1f[/url] Visual Studio 2008 SP1’s ADO.NET Entity Framework has generated an Entity Model like this: [url]http://postimage.org/image/lulmehljv/[/url] I have created some methods as follows: [code] private void buttonAddPatient_Click(object sender, EventArgs e) … |
| | hey me and my group are doing a project but we dont know how to use the file pointer (to export the C program to a text file and we dont know how to make it so the random generator makes our words go diagonal top left bottom left top … |
| | [CODE]#include <stdio.h> #include <conio.h> #include <math.h> // +-*/ void readArray(int *a, int n) //fuctie care citeste un tablou { for(int i=0; i<n; i++) { printf("A[%i]=",i); scanf("%i",&a[i]); } } void printArray(int *a, int n) { for(int i=0; i<n; i++) { printf("%i ",a[i]); } } void patratPerfect(int *a,int n) { for(int i=0; …  |
| | if write/take a one space after ACCESS SPECIFIER in a scanf(), then why it takes extra inputs???????? e.g. scanf("%d ",&n); it will take numbers....instead of one?  |
| | i get this error every time i try to compile the code below. any suggestions --------------------------------------------------------------------------------------- Compiler: Default compiler Executing gcc.exe... gcc.exe "C:\Users\ndayala\Desktop\19266\main_random.c" -o "C:\Users\ndayala\Desktop\19266\main_random.exe" -I"C:\Dev-Cpp\include" -L"C:\Dev-Cpp\lib" C:\Users\ndayala\Desktop\19266\main_random.c:9:22: sys/mman.h: No such file or directory C:\Users\ndayala\Desktop\19266\main_random.c: In function `main': C:\Users\ndayala\Desktop\19266\main_random.c:30: error: `PROT_READ' undeclared (first use in this function) C:\Users\ndayala\Desktop\19266\main_random.c:30: error: (Each …  |
 | I'm trying to do the third writer/reader problem with semaphore (as mention on wiki). But it's not working properly. First 16-element array seem to work properly. But after first, it got wrong. Even though I think I'm almost there, I can't find the error at all. My code is as … |
| | Hi all, I have a question regarding an extern variable. ---test.c [CODE]#include <stdio.h> #include </home/peuceul/debug/test.h> extern int a; int print1() { printf("value of a in extern is %d\n", a); int a = 2; printf("value of a is %d\n", a); } int print2() { printf("value of a in second method is …  |
| | [CODE]#include<stdio.h> #include<conio.h> struct node{ int data; struct node *next; }; struct node *creat_list(struct node *start); void display(struct node *start); struct node *addatbeg(struct node *start,int data); struct node *addatend(struct node *start,int data); int main(void) { struct node *start=NULL; int choice,data; while(1) { printf("1.creat linklist\n"); printf("2.display\n"); printf("3.add at beg\n"); printf("4.adda t end\n"); … |
| | I don't get it why my threads can't perform properly for writer/reader problem. I think something with the semaphore. but can't solve and online can't help me too. [CODE] semaphore mutex, read, write; void *reader(void *argv) { char buffer[200]; int readNo, i=0; do { sem_wait(&read); sem_wait(&mutex); sem_getvalue(&read, &readNo); fgets(buffer, sizeof(buffer), … |
| | hello i am trying to broadcast some values, but i dont see the function of broadcast happening....the code i had written to broadcast is #include <stdio.h> #include <stdlib.h> #include <mpi.h> int main(int argc, char *argv[]) { int rank, size, i, n, num, send; n=atoi(argv[1]); MPI_Init(&argc, &argv); MPI_Comm_size(MPI_COMM_WORLD,&size); MPI_Comm_rank(MPI_COMM_WORLD,&rank); if(rank==0) { … |
| | Working on an assignment for class. I was able to get the sorts created buy for some reason im having a problem with reducing redundant code within my int main() function [code] /* 1.) create 10, 100, 1000, and 10000 randomly generated elements 2.) Perform The Following Sorts on the … |
| | Hello all, I recently installed MinGW on my XP Pro box (SP 3). When I click on the shell icon, the resulting behavior of the MinGW shell console window is incorrect. Initially, the console opens up as it should, complete with frame and scroll bars, but after about 5 seconds, … |
| | Ok, to the point as suggested. Second semester CS assignment to write program that reads maze info in from txt file to create maze a solves the maze recusively. I've got a dynamically allocated 2D array wtih each cell containing number that detemines the walls by bit values and it … |
| | well i am trying to do a program, where the process 0 should start the initialization of sending messages to a random process other than itself, then the random process selected should receive the message and send to another random process. This should happen until the requested number of messages … |
| | This is my first post on daniweb :) and i am a beginner in C programming and i don't know so good english :) sorry! This is my program My problem consist of I run the program and i can't get to the [B]scanf("%c",&q);[/B] [I]/* Row 21 after printf. */[/I], … |
| | Hello, I need help to combine a c-program using curl(to retrieve txt files from internet) and another c-program using popen. currently the popen is using the command ls -l (to list the current folder in terminal). I have 2 files, the first one is curl program, which have to retrieve …  |
| | [CODE]#include<stdio.h> #include<conio.h> //header file declaring void main() { int a,i; clrscr(); printf("\n Enter the Number:"); //get value scanf("%d",&a); if(a%2==0) { printf("\n Not prime number"); } else { for(i=3; i<a; i=i+2) { if(a%i==0) { printf("\n Not a prime"); break; } } printf("\n Prime number"); } getch(); } [/CODE] |
| | I've already write a program which allow you to enter name, address and write in the file name,length of name, address ,length of address. File is called "input.dat" Now i need to write another program that reads the file "input.dat" (the one above), displays the name, the size of the …  |
| | can anyone please tell me whats actually happening in this code. Seems to be as if incremented pointer is pointing to the next bit of same int. Answer is 2,0 Thanks in advance [code=c] #include<stdio.h> #include<conio.h> void main() { int arr[3]={2,3,4}; char *p; p=arr; p(char*)((int *)(p)); printf("%d",*p); p=(int*)(p+1); printf("%d",*p); getch(); … |
| | My research group is trying to implement a hash table to reduce the effects of a very costly step in our calculations. Basically, it can take more than an hour to go from A to B, and B is something ridiculously simple, like a number between 1 and 100. A … |
| | Hi All, I wanna to search a pattern in a txt file called A which is a 2D matrix from another file called B. The requirment is that I need to output the number of matched pattern in file B. But I encounted difficulty of counting the number. Basically I … |
| | Hi I currently have a winform inside a MDI like the one in the picture to the left, how can I get it so that it looks like the one on the right with all the bars and icons removed [URL=http://imgur.com/F134B][IMG]http://i.imgur.com/F134B.png[/IMG][/URL] cheers sam |
| | hello. i make a program for bus ticket reservation and i want to put a seat number in there. so if want to loop the program, and if i pick the same seat number, the program will tell me the seat is taken. is it possible to save information before … |
| | i have to find proper divisors of a positive integer.for instance,the proper divisor of 15 are 1,3,5. input 15 output 1 3 5 like that. Thank you for your helps. |
| | hi. this is my program for bus ticket detail. at the bottom of my program, i want user to input yes or no for loop this program. but before i can input anything, it already told me that 'Please input the correct answer'. it is like i already input something. … |
| | Can any body tell me the difference between file descriptor and filepointer in C on linux? and when to use what? |
| | [CODE]#include<stdio.h> #include<conio.h> struct bnode{ struct bnode *child[5]; int count; int value[5]; }; typedef struct bnode node; node * root=NULL; void insert(int val); int put(int,node*,int *,node**); void fillnode(int ,node *,node*,int); int search(int,node *,int *); void insert(int val) { int i,flag; node * c,*n; flag=put(val,root,&i,&c); if(flag) { n=(node*)malloc(sizeof(node)); n->count=1;//setting count 1 n->value[1]=i;//setting … |
| | Ok so, I'm working on a program that is suppose to solve a function: (1+ (x^2) / sqrt(3x+6)) / (x^2 - 5x) As you tell by the function the denominator cannot be = to 0. So here's my code that I'm having trouble with. [CODE] #include <stdio.h> #include <math.h> int … |
| | hello. i have a problem in selecting destination and time. when i select any number in destination the program always tell me that i choose number 1 (taiping). and the time it always show 1030 even i input number that is not 1. please tell me where i'm wrong here. … |
 | My problem is as said "expected ';' before "int" " I dont the problem => This obviusly aint the hole text, rather its the place where its complaining. [CODE]int tarning2(void) { return(tarning1()+tarning1()); } int tarning1(void) { int max = 6, min = 1; return (rand()%(max-min+1)+min); }[/CODE] This might have something … |
 | So in C# I can create an array of n elements: [CODE] int[] myArray = new int[n]; [/CODE] I have looked and it doesn't seem as though I can create an array like this in C++ (using new). Could anyone please explain why I cannot use new to create an … |
| | I am writing code for a C++ class. I have tried a couple of different ways to write it, but I keep failing. Here is what I have so far and also what the assignment asks us to do. Please help You have been asked to write a program to … |
| | Hi, i would like to know to retrieve out the date and time from my database to show on the wcf test client and for eg, after choosing a certain date, how to do the coding in order for the events to show that's happening on the date i choose … |
 | hi, I already know how to use setprecision but the function wont let the round go up past 16. [CODE]#include<iostream> #include<stdio.h> #include<math.h> #include<iomanip> using namespace std; int main () { double pi = 3.14159265358979323846264338327950288419716939937510; cout << setprecision(50) << pi << endl; system("pause"); } [/CODE] the output is just 3.1415926535897931 the … |
| | hey guys lol i spent 5 hrs thinking about building this asterick pattern and i am still getting troubled by the spacing for the 3rd pattern , anyone can help me to reduce 1 spacing so the 3rd pattern isn't out of place?XD [CODE]#include <stdio.h> int main() { int c,c_2,c_3,c_4,c_5,c_6,c_7,c_8; … |
| | Hello everyone. I'm trying to code the cd shell command in c. I used chdir function to code it but the problem is that when I execute the program on the terminal it doesn't change the directory. I kept a series printfs and conditions to test if it changes, though … |
| | hi guys, iam a beginner in c and i have got a project to make a program to keep the track of stock and cash of a shop i had done my work but i want to add purchase and iam unable to keep the work in history as a … |
| | I have a C# program that I run on a Windows PC and a camera app running on a Windows CE6 terminal. The two are connected using Activesync 4.5. From the PC app, I want to be able to do the following. 1. Launch the terminal app 2. With the … |
 | Is it possible to create an array of functions in Java? Or is this not possible?  |
| | Building a phonebook program for school--very much a work in progress. I still need to write a sort function, tweak my delete function, etc. But actually what I'm hoping you folks could answer is hopefully simpler--for some reason I seem to have a while loop that is executing twice, and … |
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