[c] Forum Topics

Hi everyone I have this project for my programming class and would appreciate it if someone could point me in the right direction. The objective of the lab is to write a C program that will be able to solve a boolean formula and print all the satisfying assignments. This …

I have a question regarding the use of malloc and realloc: for this, "part", of my assignment, I have to read in every word from a text file and count the number of times it appears in a text file. The definition of a word in this assignment is very …

I have an assignment with a slightly strange implementation of priority queues using a binary tree. I'm really having trouble trying to understand how to make my insert function work when the parameters are as follows [CODE]void insert(tree t, void* item)[/CODE] where item is the data going to be inserted. …

hello everyone. couple of days back i started learning C (with the help of internet) i have do while loop which i can't get to work as long as i know, when i press 'y' it should again ask temperature. but it is not doing that. i am using Turbo …

I am trying to generate a random number, but it should not be a particular number. So i am passing the number which should not be the random number and the range in which it has to be generated to the function, and i am reinvoking the function if the …

Hi, can anyone out help me with my assignment which is to read an image file of a maze and find an exit of it. As I'm still kinda of new @ C programming, I'm having problems even reading the image onto C. Cheers Ming

C is a medium level language ? i guess c++ also that's why C/C++ are faster than others, but i dont think VB/C# example are to slow like some says. That i hear exactly is: (" a ATM Software can't be in High level language VB/C#/Java because are to slow …

I am having problems with my turbo c. its showing me that it cannot find out the include<stdio.h> file from the system.

hello im new in programming and i need help in printing this kind of output [CODE] * * * * * * * * * *[/CODE] the number of iterations depends on users input please help me

hey guys lol to be honest...i just got this based off of luck x.x idk how but i can't keep doing this with the rest of my programs lol this is a program for an asterick pattern any way i can improve it just by using for loops?please im open …

I wrote this program and it compiled with no errors or warnings but when i went to run it i get a segmentation fault and i cant figure out what is causing it. Ive spent hours and hours on this . Anyone with some expertise willing to take a look? …

After trying to start writing my long paper "Programing, The Art" I noticed that, getting user imput, conditional statements, using escape charecters, exicuting system commands, and even declaring variables and using them so that they have use; these are all difficult outside of the domain of C and C++, even …

** EDIT: sorry, typo in my title. I meant to write 3 pointers instead of 2. I am trying to revise/create a function in which it is given given three pointers to floats and reorders the values pointed to into ascending order. The prototype for the function would be: void …

Hello Dani Web Forum, I'm really new to C. I have an assignment, which I think it's very hard to solve. I have to create a Currency Converter Program that reads data from txt files. The program should also be able to read arguments (argv[]). I'm really confused since it's …

why do my programs just flash off the screen when i try to execute them? i am new to programming, don't forget!

Hello everyone I am using bsearch() method to find whether the element is in list or not, but i don't know how to find the index of that element. here is the code which i have done:-- [CODE] #include <stdlib.h> #include <stdio.h> int arr[11] = { 10,22,37,49,51,66,68,73,75,79,81 }; int comp(const …

Hi could you help me ? how to implement 2 stacks with a queue in data structurs ?

Can i change the array's rows length after i define it as constant or any other way? Can you under my code or explanation? [CODE]#include<stdio.h> #define CLASS_SIZE 20 //First define the array rows's length void main() { double gpa, average, highest, lowest; int student, rows, i, j; char grade[CLASS_SIZE][5]; //Wish …

I am a new member of this forum!:icon_smile: and I just want to introduce myself, my name is Inda and i am from Indonesia. i need for your help guys, i have some problem in double link list, how it make in .c and .h?

This may be a rather simple thing to answer, but I am no programming expert. Let me explain my problem in detail: for this homework assignment I need to open up a file with simple text in it, format it so that each line is reduced to a certain number …

using the standard function in atoi() wont work. it gives me an error that says "assignment makes pointer from integer without a cast" this is sample of the code.. [CODE]struct integer* convert_integer(char* stringInt) { struct integer* convertedInt_1; char* stringArray3 = (char *) malloc (sizeof(char));; free(stringArray3); stringArray3 = stringInt; convertedInt_1->digits = …

Hi friends, help me out Generally If the call to fork() is executed successfully Unix will create identical copies address spaces and the execution starts from the next statement of the fork() So, in such case output of the following prog must be #include<stdio.h> { printf("\nwelcome to"); fork(); printf("\nDaniWeb Discussion"); …

Suppose that you have a structure defined as such. [CODE] typedef struct Deity { char name[80]; char religion[80]; int numAppendages; } Deity;[/CODE] And, suppose you have a pointer to a Diety structure. Deity* deityPtr; Assuming that at some point you allocate memory for a Deity structure, assign its address to …

Hi, I need help with this, I'm reading a txt file that has this format: 10,4,12,6,18,24,7,8,15,14,25,2 So far, I read the file using fopen ().Also, I used strtok () to split the string into tokens, but i don't know how store the tokens into an array. any ideas? thanks [CODE] …

Hi folks, I'm trying following code.. [CODE] #include<stdio.h> int calsum(int a,int b,int c); int main(){ int x,y,z,sum=0; printf("Enter the 3 numbers:\n"); scanf("%d%d%d",&x,&y,&z); sum=calsum(x,y,z); printf("The vlaue of sum is :%d\n",sum); return 0; } int calsum(int a,int b,int c){ int d=0; printf("The value of d is:%d",d); d=a+b+c; } [/CODE] ** (1) ** …

AOA Dear fellows i have code in which i uses linked list.when i compile that program the compiled file run but not work. I write this code in Dev c++. [CODE] #include <iostream.h> #include <string.h> #include <stdlib.h> using namespace std; class Node { public: int value; string Name; Node * …

I have been working on this code for a while and I can't seem to get to work right. I have been trying to make a credit card validator program in c for a class assignment. Any help would be welcome. [CODE]#include <stdio.h> #include <ctype.h> #include <stdlib.h> #include <string.h> #include …

I used a multi dimensional array: [CODE]int grid[3][3];[/CODE] then I assigned all the variables in the array to the number 2 like this:[CODE] grid[0][0] = 2; grid[0][1] = 2; grid[0][2] = 2; grid[1][0] = 2; grid[1][1] = 2; grid[1][2] = 2; grid[2][0] = 2; grid[2][1] = 2; grid[2][2] = 2;[/CODE] …

This is a question from some book. When u run it u would get base address of the arguments provided that is, if u write in CMD "myprog one two three" then the address would be like 65521 n 65525 n 65529 Means equal byte consumption by all the arguments. …

Hi all! I am having trouble accessing dynamic information. I have used the malloc command to allocate the necessary memory for my struct. However, when I leave that function and enter a display function it says there is a problem accessing the information in the struct. I just had a …

I've searched google and tried several different things but I can't figure out how to read strings into a two dimensional character array and also read doubles into separate arrays all from the same text file. Please provide any help you can and let me know how you might accomplish …

[CODE]#include <stdio.h> #include <stdlib.h> #include <math.h> float f(float x); float df(float x); int main(){ float x=-0.7; int i=0; float y; do{ printf("f(x) is %f",f(x)); y=x-(f(x)/df(x)); x=y; i=i+1; printf("repeats %d",i); printf("x is %f",x); }while (f(x)!=0); return(0);} float f(float x) { return (x+pow(exp,-10.0*pow(x,2.0))*cos(x)); } float df(x) { return ((1-20*x*exp^(-10*(x)^2)*cos(x)-exp^(-10*(x)^2)*sin(x))); }[/CODE]

The problem ''Ask the user to enter a year and store it in an int. Then assign to a _Bool variable the value true if the year is a leap year. The leap year is any year whose number is a multiple of four. Take into account that years whose …

Hi.... I wrote a program for Quick Sort algorithm.... It is compiled fine....but it is giving a run time error i.e., Segmentation Fault.... I tried hard but couldn't find out what is that thing causing segmentation error in this program.... Please help.... I'm getting segmentation fault very frequently (i'm using …

I’m trying to use an Aug20th 2005, how to set file access time, here on DaniWeb. I need to modify the file times for a “C”, not C++, Visual Studio 5, console ap that I am working on. Here is the exact code for the project: [CODE]#include <windows.h> #include <stdio.h> …

Does USSD syntax include other characters other than "[B] * and digits[/B]". While [I]googling [/I] I have not found where it is explicitly explained. This is because I am getting ERROR while sending USSD which consists of spaces and : (column)

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'm a rather experienced, self-taught C/C++ programmer. I go by the name Tum in other places and I am involved in SDL game design. I am happy to help people with their coding problems when I can.

Name: Vega Age:19 Location:India Qualification: Studying undergrad compsc engg course. Interests: Gaming (DOTA), reading, anime I am a newbie c & cpp coder. Just stumbled upon this site trying to solve a few errors in my ds project. Hope to have a good time here.

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 all, U have a project that I am trying to figure out how to start, I don't have very strong programming skills, so I'm actually quite lost here. Any help is appreciated. Basically here is what I have to do: 8 processes are characterized by 5 readers and 3 …

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 …

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 …