[c] Forum Topics

It is said in many places that comparing two floating numbers for equality can give wrong result and we have to take into account some epsilon value like this float f1,f2; if (f1-f2<epsilon) printf("gotcha"); So what is the reasonable estimate of epsilon? My intuition is that that has to be …

how does long and long long differ? The machine I am using has core 2 duo processor. It shows the same size (8 bytes) for both of them. Was short type ever was 1 byte and changed to 2 bytes later on? Was long and int ever was 4 byte …

I need an algorithm for the following problem: There's a tree with N fruits each with its own weight w[i] and height h[i]. I can only reach a fruit if it's no taller than H inches. Also every time I pick a fruit, all the other fruits in the tree …

hai friends can anyone give me an example of a program to hash using crypt(3) thanks linux learner.

Guys, I need help When I compile my code, I get [code]error: invalid operands to binary ^ (have ‘float’ and ‘double’)[/code] Here's some portion of my code: [code=c] #include <stdlib.h> #include <stdio.h> ... float freq; const float key_magic = 2 ^ (1/12); ... freq=440*(key_magic)^(atof(optarg)-49); [/code] Thanks

Can anyone tell me the valid priority values? positive or negative??I have two threads spawning from the main() , say thread1 and thread2. thread2 always executes much faster than thread1. I want the other way round, because thread1 is much more important than thread2 in my program. Hence I was …

I've got this game almost working. When I run it in my complier is "blows" up at this line: [CODE]if (facesInHand[numberInHand2][1] != 0 && facesInHand[numberInHand2][2] != 0 && facesInhand[numberInHand2][3] != 0 && facesInhand[numberInHand2][4] != 0 && facesInhand[numberInHand2][13] != 0) straight = 1; else straight = 0;[/CODE] and continues through the …

Looking at the First In First Out (FIFO) data situation. Just like a line at the grocery store check-out. Its counterpart FILO would be like a stack of dinner plates.

Hello, everyone! I have a program (a tcp server for text messages exchange), and i want it to do the following thing: if a port is already in use - choose automatically a new one (via rand() function) and inform me about that. I'm testing it on Solaras 5.9 if …

Hey guys, ive been working on this code for the past couple of hours and I am trying to do the following problem. Write a program that reads the le generated by randGen.cpp (in Problem 1) and stores the numbers in an array of type int. You can assume that …

I write a C program that reads a text file and copies it to standard output, adding to the start of each line the line number and the number of characters in the line. For example, if file contained the following: Hello Daniweb forum How are you today? Good day …

Hello, I'm fairly new to C. But my question is simple. I am creating a program that will take in 4 characters from the keyboard(1 at a time). Then it will display these 4 char on one line but in order as they were inputted. (In one print function).What code …

I am having problems with my code it says that the value compare is not being intitalized please help. I need to enter seven words total then sort them out.please help. [CODE]// it might work2.cpp : Defines the entry point for the console application. // #include "stdafx.h" /* Inputs a …

Hi, Here's a part of the code: [CODE]#define S 1000 /* rows */ #define T 200 /* columns */ int main() { int n, i, j; float **x; x=(float**) malloc (T*sizeof(float*)); for(i=0; i<T; i++) x[i]=(float*) malloc (S*sizeof(float)); memset(x, 0, sizeof(x[0][0])*S*T); return 0; }[/CODE] This was compiled well (gcc) and had …

Hey guys. I'm having some issues with my Visual Studio 2008 Pro. I'm trying to compile the following code, included in the link [url]http://pastebin.com/r6WsG5r7;[/url] but, whenever I try compiling the code, I get like 5 erros: The errors are listed below. Why is it that moving certain declarations around changes …

Hello! Just wondering if someone might see what is wrong with this piece of code. I am trying to get the number of rows in resultsDaily so that my for loop may start at that number, so as to append the matrix. here are my header files: #include <iostream> #include …

[QUOTE]Hello..can anyone help me in order to solve this problem regarding the collision that happend.. I use the modulo-division hash function and intended to use the chaining solution method to resolve this collision but i got stuck.. because i dont really have the full knowledge in link list..Can someone that …

please check this script [code]//program to add to 8 bit binory numbers(2) #include<iostream> using namespace std; int binory(int ,int *p); int addbinory(int *,int *, int *); //this is c++ program so if u want convert it c just change your cout to printf and cin to scanf and do nessassory …

Write a simple program to find the size of differenr basic data types in c.

Below is the code, when it run shows a combination of back-slash and forward slash and by putting them together and printing them shows a stick rotating. The problem is that it is only rotating at a same position I want to move it back and forth in a line. …

i want to write a program for reading mpeg-4 file headers to get info such as filetype ,encoder,bitrate,etc.. is there any library of these functions? i tried searching the forums but could find any desirable results ... i aint asking for the code.. jus a little help on which library …

In which path gcc resides in IBM AIX.Due to some change change in my .profile the path variable got changed now i am not able to get the path of gcc. please help me

I am attempting to put integers from a text file to an array. I am new to C. I have already found the number of lines and opened the file. I do not understand why this does not work: [CODE] for(i = 0; i <= numberlines; i++) { fscanf(f, "%d", …

Hello, I am still green to the C programming language. I am writing a multi-dimensional array program to store strings into an array. The program requires error checking to avoid overflow. I am using Visual Studio 2008. I am using a Windows O/S. The program runs fine on the first …

I want to create a function in which a text printed just shown for 1 sec then flush and then a new text appear.. basically the purpose is to create a loader...which appers when the data is manipulating..it will show like this. \|/.....when it moves fast ..it looks like a …

How do I write this code without the malloc function? [CODE]// 222.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #define N 6 #define MAX_STRLEN 80 void sort(char **a, int n); char *stringArray[N]; int main(int argc, char *argv[]) { int …

Hello. This is my first posting so I will try to be as detailed and clear as possible. I am running into a problem with a method returning an incorrect value and I can't quite seem to figure out why. I'm building a Rolodex which is really just an object …

Hello everyone I am trying to learn about the compilation process. I am working on a pretty simple SDL game, but I know that making games isn't very practical, so I am using the project to learn about other programming aspects as well. One of the things I am trying …

I have encountered a problem with the following function when I use it. I do not know what is going on, and would like to ask for advise. The program compiles without any error, but when I execute it, it just freezes and exits. [CODE=c] typedef long long unsigned int …

Hi There. I am trying to use libCurl to copy the contents of a webpage into a string in C. This is what I have so far: [CODE]void Cmd_translate_f (char *message) { CURL *curl; CURLcode res; curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, va("http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=%s!&langpair=en|fr"),message); curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data); res = curl_easy_perform(curl); …

Can someone help me to make my function getbase2 to work? It needs to return a string value. [CODE]#include<stdio.h> char GetBase2(int iBase, int iNumber); int main() { int i; int number; printf("Enter number: "); scanf("%i", & number); printf("Enter base: "); scanf("%i", & i); printF("Conversion: %s\n",GetBase2(i,number)); } // Base 11 upwards …

Myself Pranesh s new member for this community.. I'm studing engineering(Computer Science..) I'm intersted in Programming..so Enjoy Lot while programming... My Intersted subjects are:C,C++,JAVA... My Hobbies are:Photography,Singing Thanks for ur involvement..

hello guys, the output of the program should be like this: [ICODE] With how many numbers do you love to work with? 3 Enter no 1: 23.4 Enter no 2: 15.54 Enter no3: 55.48 In ascending order the numbers are: 15.54 23.40 55.48 [/ICODE] I've written this program: [CODE] #include …

#include<stdio.h> void squeez(char s[],char z[]); int main() { char s[100] = "Hey wassup !!!!!!"; char z[100] = "Wow cool!!!!!"; squeez(s,z); return(0); } void squeez(char s[] , char z[]) { int j,dummy = 0,i=0; char x[100]; for(j = 0 ; s[j] != '\0';j++)/* the starting loop */ { while(z[i] != '\0') …

If say I have only the binary of a another source file (no original source is available), then how to create this with my own program. Like say I have a source file containing some function print_hello() Now I compile it and get the binary lib.o Now another program test_lib.c …

Hi. I am also having a standard deviation problem. When I try to calculate the sandard deviation of the numbers below with the suggested algorithm, I run into square root of a negative number. The algorithm does work for some data sets, but neither this one or 8 others. Does …

Here is the source code I came up with: #include <stdio.h> #define SPACE ' ' int main(void) { char c, prev; int space, newline; long other; space = 0; newline = 0; other = 0L; printf("Enter text to be analyzed (# to terminate):\n"); __fpurge(stdin); /* clears buffer */ while((c = …

number of iterations in the following loop [CODE]main() { int x=5, y=10, z=9 for (;x<=5;) {y++;z--; x=x+1/2; if(z==0) z=y;}}[/CODE]

hi all, i need help... ok, about the 2nd statement... [CODE] unsigned char buffer[BUFSIZ]; ... buffer[i] ^= argv[3][j++]; [/CODE] ok buffer contains characters from a file... so im a little confused about what that statement does... both the "^=" and the argv part... can anyone explain? thanks in advance...

Hi. I have a bit of a problem with this code: [CODE] #include <stdio.h> #include <conio.h> #include <stdlib.h> main () { FILE *data; char let; int prior, ctr; data = fopen("huffman_table.txt", "r"); while (fscanf(data, "%c%d\n",&let, &prior)!='\0') { printf("\nLetter: %c Priority: %d", let, prior); } fclose(data); getche(); } [/CODE] The huffman_table.txt …

Hello guys, this is my first time in these forums, so I apologize for my bad English. Well, here's the problem: I need to get the frequency of integer numbers that are stored in a file, their range is from 0 to 100, their amount is unknown and depends on …

I really need some help implementing counters. I have to count the suits and faces drawn from the deck but for some reason all outputs is junk numbers. Am I missing something? I what it to come out something like this: Say a player is dealt: Ace of Hearts Ten …

Hi people, my first post here, hope its a good one. I am trying to develop a program which will simulate a very simple name server, using the client-server frame. My problem appears after the server receives the data (in form of a string) from the client and tries to …

I'm teaching myself C, and wrote this string reverse function. I cannot figure out why it is crashing... [code=c]#include <stdio.h> void ReverseString(char *inStr, int length); void ReverseString(char *inStr, int length) { char temp; int j=length; int i=0; while( i != j) { temp = *(inStr+i); *(inStr+i) = *(inStr+j); *(inStr+j) = …

it is not complete.........u may need to do some modifications Regards, Bhanu[code]#include<stdio.h> #include<pthread.h> #include<signal.h> struct lift { int status; int movement; }l[8]; struct floorno { int curfloor; int destfloor; }f[8]; int i; void main() { int ch; int j; for (j=0;j<8;j++) { l[j].status=0; l[j].movement=0; } pthread_t lift[8]; j=0; while(1) { …

Hi I am trying to malloc align each location of an array to 128 bits. I am using the method malloc_align in linux to align arrays and so on. But in this case I want to align each position of an array to 128 bits for(i=0;i<size;i++){ //N=7 2^N=128 array[i]=malloc_align(sizeof(double),7) ; …

hi, i i recently installed dev c++ 4.9.9.2 ....the first hello world program i wrote gave me some insane messages when i compiled & the exe files which gets created...my antivirus detects them as trojan flies & deletes them....i tired & re -installed dev again but it didnt help...please help …

I've just learned how to use vectors. I'm thinking about, what is the best way to create a vector, IF you do not know its initial size. Here are some of my options. 1.) This is the simplest I think, but is there any memory issue about this technique? [CODE] …

Hi,am newbie to c programming.can u explain the above c program which reads a file more than its capcity.. i couldn understand more than this.. Thanks,Yasokrish.[code]#include <stdlib.h> #include <stdio.h> #include <string.h> int bof(FILE *badfile) { char buffer[12]; fread(buffer, sizeof(char), 40, badfile); return 1; } int main(int argc, char **argv) { …

I need to write some contents in the text file (notepad), with some specified font, and size .is it possible in C, kindly let me know.