19,876 Topics
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| | Hey, How do I create a file from a C program? I want to check if the file exists and if it doesnt, then create it. I am using the following code to check if it exists: [code] filecheck() { b=fopen("password.csv","r+w"); if(b==NULL) { // need code for creating a file …  |
| | Hello, I am currently trying to write a program that will read from either stdin from a file (using <) or from piped input. I have the portion using the < working because i am able to read the st_size of the file and create a read() call accordingly: read(0,&inptr,stdinfo.st_size); … |
| | hi guys, i am ranjith intrested in writing c c++ progs i hav a doubt that can i write a c or c++ program to excute at a given time thanks  |
| | I want to stop the \t tab after 5 spaces, How do i do that? |
| | Okayy, So. I'm required to make a new set of functions for the <string.h> library and am confused on a few things, and am wondering if anyone can help me out. I'll toss out the ones I'm struggling with. int mystrcmp(const char* s1, const char* s2); This function will compare … |
| | i have just written a small program on DEV C++. i have been using it for couple of months but i never observed this error. [CODE] #include<stdio.h> int main() { printf("Welcome\n"); system("PAUSE"): return 0; } [/CODE] could not create makefile I/o error 32 any idea? what does that mean |
| | Hi i have a binary function search program where the user enters a index of numbers, then enters the number he wants to find. However my program wont compile and says the subscripted value is neither an array or pointer. Help me out please. Here is what ive got: [CODE]# … |
| | I was just wandering about the user interface of C applications. What are the basic things one should know about programming a graphical user interface with C. |
 | A hospital keeps a file of blood donors in which each record has the following information (i) Name (ii) Age (iii) Address (iv) Contact no. (v) Blood group. I have to write a program to enter record into a data file “blood donors.dat” and display information of each donors. And … |
| | i am new to unix. i have written a code for testing the basic functions read / write and open i have read that read/write returns the no of bytes read/written but here my write is returning 1 and read is returning 0 no matter how many chars i write. … |
| | need to replace all occurences if substring by new string. below code replace first occurence but not other substrings present in input string. |
| | Does anyone out here have an idea as to how to go bout simulating a DFA (deterministic finite automata) in C which accepts multiples of 3 ?????  |
| | I get this gcc warning with [I]-Wwrite-strings[/I] flag. I want to return a string of chars correctly but I also do not want to use [I]malloc[/I]. I've read other posts but can somebody explain how to acheive this in layman wording? [QUOTE]a.c:14: warning: passing argument 1 of ‘VAR1’ discards qualifiers …  |
| | I am new to c programming. I am trying to write a parking garage program that uses arrays to find the charge for each car and the total charge. Here is what I have so far. Please help me in any way that you can. [code=c]#include <stdio.h> #include <math.h> float …  |
| | [code=c] #include <stdio.h> #include <conio.h> int main(void) { unsigned port = 0; int value; value = outp(port, 'C'); printf("Value %c sent to port number %d\n", value, port); return 0; } [/code] It gives error 8 C:\Dev-Cpp\Abc\... `outp' undeclared (first use this function) How to solve this ?? I write function … |
| | [CODE=C] #include<stdio.h> #include<conio.h> #include<string.h> //typedef int BOOL; //#define TRUE 1 //#define FALSE 0 int a[3][4]; int Prime(int *x); void input(); void printOut(); void checkPrime(); int Prime(int *x) { int i; for( i=2; i< (int)sqrt(*x); i++ ) { if( *x%i == 0 ) return 0; } return 1; } void input() … |
| | [CODE =C] #include "conio.h" #include "stdio.h" #include "math.h" int isPrime(int n) { int i,isTrue=1; for(i=2; i<(int)sqrt(n); i++) if(n%i==0) return 0; else return 1; } int main() { int N; printf("Enter n: "); scanf("%d",&N); if(isPrime(N)) printf("prime"); else printf("Not prime\n"); getch(); return 0; } [/CODE] here is my source code, but when … |
| | Hi all I want to make an Instant Messenger Client(like gtalk)with c++. any one know something pls. help me out. if you know any available web resources pls. let me know about that .... I need only the code.I dont want the GUI prog.. pls.. pls.. |
 | Hi, I have a program that I am using to convert a string into binary. My current code is as follows: [CODE]int main(void) { string userInput; cout << "Enter a string to be converted:" << endl; cin >> userInput; for (int index = 0; index <= userInput.length(); index++) { cout … |
| | Hi, I'm trying to create a simple shell in C for Unix. I've been able to do all the parsing of commands and execution, but I'm having a problem with piping. I think the problem is that I'm not hooking into the correct pipe for the input of the second …  |
| | Is this the proper way to zero the first 12 bits of an address? [CODE] void *ans = (void*)((unsigned long)addr & ((0UL - 1) ^ 0xfff)); [/CODE] Where addr is any user process memory address.. Note this method works...I just want to know if there is a better way |
| | Good day. Here's my code. My uncle helped me with it for days but he's now out of the country for 2 weeks. I'm looking for help to improve this project of mine with mutex and semaphores. I've never used them before and I'm a little confused. I'm running this … |
| | Ok so I make my masks [CODE] short m1, m2, m3, m4; m1 = 0xF000; m2 = 0x0F00; m2 = 0x00F0; m3 = 0x000F; [/CODE] and then I test my masks [CODE]printf("%hd %hd %hd %hd\n", m1, m2, m3, m4);[/CODE] when I test it the values come out as [CODE]-4096 240 … |
| | hello, i m using c# and vb both in my web project. it gives error when connectin c# page with database. it is not taking any label taken in c# page. can anyone help me.  |
| | Please, I need help in this little problem of printing all the prime numbers from to 100. Please, if you have more than one method to the question, I would really appreciate it. I also need it as soon as possible. Thanks. |
| | hii i want c code for non preemptive scheduler where burst time and arrival time is given and u have to return waiting time from the function u will develop. please give code soon pleaseeeee.. |
| | Hi, I have an assignment where i have to write a C and assembly mixed-mode program. [LIST=1] [*]The c program takes in two characters which stand for two hex characters. [*]The assembly procedure then passes each character in turn to a C function which determines if the character is a … |
| | I am new to message queues and IPC in general. I am trying to have a process establish the queue and send a message. Then I fork and the child will read the message. The goal is to measure the execution time for different sized messages. The msgsnd is returning … |
| | I'm trying to advance my understanding of how computers and compilers work. Given the C++ program bellow with exceptions and runtime typing turned off and no optimizing that removes main or makes it into a non-standard function. [code=c]int main() {return0;}[/code] Produced an disassembly with the following code for main: [code=asm]pushl … |
| | My array keeps outputting this random character (kind of like a # in a box). Anyways, its just garbage really, but how do i stop it from doing this. If my array was like char title[10] and the user inputted something with only 5 characters, then the remaining characters would …  |
| | Hi there guys, So I have two arrays, and each arrays got 5 elements (integers). My goal is to to arrange the elements of each of those arrays in a descending order and save them in a new array. I started off with bubble sorting each of those arrays and … |
| | Hey, How do you read from the command line in C? I need to read 10 arguments from the command line. Can I use char* argv[] as a parameter in the main function to do so? Thanks. |
| | I made a program that inputs the radius of a circle, and then should output a circle of asterisks. however, I am just getting the fourth-quadrant part of the circle, and I need the whole circle to be printout. what do I need in my code? this is my code: … |
| | Hi, I'm new here and I just need a little help with pointers and 2D arrays. I'm kind of new to programming so this might be redundant. I'm trying to make a 2D array of pointers (already have done) that points to another 2D array of double values... I have … |
| | please provide the free pdf link of k & R c prog lang. i spent lot of time in googling but couldnot get it. thanks in adv. |
| | So, I have a server process that forks for every client that connects. I keep a list of connected clients that I want each fork process to have. Of course, when the process forks the child only has what it had when the fork occurred. For the solution to this, … |
| | Hey guys, im about to write an application which has a visual GUI doing representation of a system (lots of pretty colours and flashing objects etc), which represent what is happening with packets and external devices being inserted into the system. I need to use one of the Win32 APIs, … |
| | sir, we want complete c programme for huffman encoding & decoding.im doing my b.tech project .please send me the code |
| | [CODE] #include<stdio.h> #include<conio.h> #include<string.h> int n; char (*p)[40],*temp; void Input(); void ABCsorting(); void Input() { printf("How many persons u want to input: "); scanf("%d",&n); p=(char*)malloc(n*40*sizeof(char)); temp=(char*)malloc(n*sizeof(char)); int i; for(i=0; i<n ; i++) { printf("String %d: ",i+1); fflush(stdin); gets(p[i]); } printf("All strings before sorting: \n"); /*for(i=0; i<n ; i++) { printf(" …  |
| | Hi! I have had to change from Python to C because of university instructions. My problem is that, when I want to make a menu for my program or whatever, I always want to define classes:P My question is simple --> are structures the best way to "replace" classes? TY |
| | I'm not sure about the difference between *p[5] and (*p)[5]? Please help me clarify them? Thanks a lot! |
| | Hi there, I was trying to code a simple program that bubble sorts an array into a list of numbers arranged in a descending order: Here is the code I used: [CODE=c] #define size1 5 #define size2 5 #include <stdio.h> int main() { int a[size1]={8,4,5,2,3};//array 1 int i=0; int n=0; …  |
| | Dont know these types of questions are asked here or not but if any one has idea please help me. i just started started learning system programming and want to pursue a career in the sys prog area. below is the program that use a fork() call. i read in … |
| | Hey guys, I've got an issue with the bowling program I've created. It's outputting the wrong scores, but I believe it's because of wrong bowling code. Is there anything wrong that you can see? One of the issues I'm having is frame 2, where the scores were 9 and 1, … |
| | Hi I'm creating a multiple form GUI app using a scene-manager to set the current visible form. There isn't an issue regarding it working, that's fine. What I am noticing is that when each form is set to be active/visible, it takes a few seconds to load each component, and … |
 | Dear forum members, Could you please let me know from your experience the best avaibable textbooks to learn C# effectively with examples? I am planning to start to learn C# programming but I have no idea from where to start and which book to read. I have Deitel's books Programming … |
| | How do I generate random numbers in C? The user doesn't enter anything, I'm just looking for a way to generate random numbers every time I run the program. Thanks guys! |
| | 1. Write a C program to convert a given infix expression to postfix form using stacks 2. Write a C program to evaluate the postfix expression using stacks |
| | I need a function that returns the name of a key directly from the keyboard, eg, the input of '32' would return 'Space'. I know there is a function that does this, but I can't figure out which one. |
| | [CODE] #endif class BankAccount { public: double enterAccountData(); double computeInterest(); void displayAccount(); private: int accountNumber; double accountBalance; static const double RATE; } #include "stdafx.h" #include <stdlib.h> #include <conio.h> #include <stdio.h> #include <dos.h> #include <ctype.h> #include<iostream>// holds the cin and cout commands #include<conio.h>// holds the getche() instruction using namespace std; //#include …  |
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