[c] Forum Topics

Could you please tell pictorially difference bw these 2 codes(o/p is same) and suggest any source where i can once in for all resolve doubts in pointer to pointer problems except "K&R in ANSI C" [CODE]#include <stdio.h> #include <string.h> void pointer(char**); void main() { char *p[]={"name","fame","claim"}; pointer(p); } void pointer(char …

Hi folks, I need a solution for following scenario. 1. Suppose two processes running simulteneously. 2. Process (P1) has already locked a mutex (M1). 3. Process (P2) is trying to lock same mutex (M1) but as it is already locked by (P1), P2 is waiting for unlocking (M1). 4. Now …

i am trying to write a program that will prompt the user to enter test scores terminated by a negative number. and then find the min max and average of the scores inputted. i have gotten everything to work except the average. the assignment says i can only use variables …

Hi, I'm having some very hard time with my header files when working with linked lists. I'm not too sure what I need to define in them except for the prototype functions. The way to create strucs within the header files confuse me. This first file is the header for …

I am trying to make an encrypter, but as you can see, it's not working. str[] have an undeclared array size, i know that theres an option to make it with a pointer array, but i really want to make it a fixed size, also, so i can skip the …

IM HAVING PROBLEM WITH THIS PROGRAM, GOING BACK TO THE MAIN PAGE AND SELECTED PAGE, IF THE USER ANSWER NO, THE PROGRAM WILL GO BACK TO MAIN MENU IF THE USER ANSWER YES, THE PROGRAM WILL COMPUTE THE SAME PROBLEM. help PLS... THE PROGRAM BELOW WONT GO BACK TO COMPUTE …

Hello; I have 2 questions: 1- I know you can allocate memory to an array dinamically in C and C++. But, can this be done if the array is part of a structure? 2- Can the size of a dynamic array automatically grow up to a maximum or do you …

hy guys my name is georges matta from lebanon I'm 3 year computer science student i love programming . I have some skills in many programming language like [LIST] [*]c [*]html [*]java [/LIST] my best language is [B]java[/B] but still you can say a beginner and i hope that this …

[CODE] void command() { int CourseDistance, StartTime, FinishTime; char cmdChar = ' '; do { cout << "Command? : "; cin.get(cmdChar); switch (cmdChar) { case 'd': case 'D': cout << "Enter New Course Distance (NM): "; cin >> CourseDistance; break; case 's': case 'S': cout << "Enter New Race Start …

Hello everyone, I have a program that intends to create a doubly linked list of structures, using the following header (q1.h): [CODE=c]typedef struct lNode* ListNodePtr; typedef struct lNode { char* string; ListNodePtr next; ListNodePtr prev; } ListNode; [/CODE] This is my implementation: [CODE=c]#include "q1.h" #include <stdio.h> #include <stdlib.h> #include <string.h> …

This is a code which sorts arrays. I use clock_t to determine the processing time for my code. However, it always stacks with the time taken from before. It looks like it's just adding the results. [code] int main(int argc, char *argv[]) {unsigned long n;//size of array -- long for …

i did a simple bubble sort but it is ot working . help me out. [CODE] #include<stdio.h> main() { int i,j,k; int a[]={7,9,4,2,3,6}; for(i=0;i<7;i++) for(j=i+1;j<7;j++) if(a[j]<a[j-1]) { k=a[j]; a[j]=a[j-1]; a[j-1]=k; } for(i=0;i<7;i++) printf("a[%d]==>%d",i,a[i]); } [/CODE]

As this is my first post on this forum I want to say "Hello!" to everybody and I hope that we'll help each other as much as we can and we'll be very good friends. :) So, this is my problem ( a rather simple one but I don't know …

hi can u ppl help me on this. can i use multiple enums in a single c program, if so is there any constrain on it? [CODE]enum pattern1 {red, green, yellow} pt1; enum pattern2 {orange, blue, black} p2; enum pattern3 {white, grey, violet} p3;[/CODE] is this possible????

using circular link list by using class Class Employee { Eid integer ; Ename string; Esalary real ; Edesignation string ; } how we can do following operation: Create a link list Insert a node after a specific node with a given Eid Insert a node before a specific node …

I want my program to just continue as long as the user press any key How do we do it with only use of scanf?? for example: int main(void) { while(1) /*my program goes here*/ printf("Hit any keys to continues......"); scanf // how? }

Hello. I am learning C++, and I am a little stuck. Right now, I'm working on pointers. The problem I'm working on requires sorting an array of structures, using pointers instead of array indices, using a selection sort. My code is not working, and I can't quite figure out why. …

i have to write a program, in which i have to make pointer to point to the character, where it last occured in a string. For example: String: Lord of the rings Character: r Pointer points to the last 'r' in the string, that is in the word 'rings'. If …

I want to Write a program that determines the day number (1 to 336) in a year for a date that is provided as input data. As an example, January 1, 1994, is day 1. December 31, 1993, is day 365. December 31, 1996, is day 336, since 1996 is …

Hello all. I am trying to convert a c document to c++. I requires that i use the out word like this. [CODE] if (executeCommand("QUIT", out response)) [/CODE] is there and out for c, or a better way that i'm unaware of. Thanks all for your time. bye

Greetings all; what I'm trying to do is create an array of structs dynamically by using functions for allocation, display, and then freeing memory. I'm *able* to do the process if it's within scope of the foo declaration, but the initFoo function throws an exception. I *think* it's the order …

please find what error in this program.while run it wont display the output #include<iostream.h> #include<fstream.h> #include <stdio.h> #include<conio.h> #include <sys\stat.h> class file { private: int i; int alphabet; int space; public: void alphabets(); void spaces(); }; void file::alphabets() { alphabet=0; fstream f; char s; f.open("NNEWFILE.TXT",ios::in|ios::app|ios::binary); f.get(s); while(s!=EOF ) { if(i>63&&i<91||i>96&&i<123) …

Hello all. I am trying to convert a c document to c++. I requires that i use the out word like this. [CODE] if (executeCommand("QUIT", out response)) [/CODE] is there and out for c, or a better way that i'm unaware of. Thanks all for your time. bye

hi guys .. i have an assignment .. and i didn`t now that i have to do it by tomorrow and now i have no time .. i will be thankful if you can help me.. "Write a program that determines the day number (1 to 336) in a year …

how can i convert this into a struct? the program is prnting all the even nos [CODE]void main() { int num[5],even[5],count,j=0; clrscr(); printf("Enter 5 numbers\n"); for(count=0;count<5;count++) { scanf("%d",&num[count]); } for(count=0;count<5;count++) { if((num[count]%2)==0) { even[j]=num[count]; j++; } } printf("EVEN:\n"); for(count=0;count<j;count++) { printf("%d\t",even[count]); } getch(); }[/CODE]

Here is the program that I want to create: Calculate the grade point average for a student whose information is stored in a file named prog4Data.txt. The file contains the following information: line 1: student’s name in format First Name Middle Name (optional) Last Name – names are separated by …

HELP me to make this program, it's so hard to understand anyone can help me to make a program?? PLEASE!!! Using an appropriate definition of listnode, design a simple linked list class with only two member function and a defult constructor: void add(double x) boolean isMumber(double x) LinkedList(); The add …

I'm working on a tcp server and client for linux. I want the tcp server to send a 10MB file to it on request and I want the client to save it to local disk. I would appreciate any help on it. Thanks for the help. jdm server: [CODE] /* …

[CODE] unsigned int *a; a = (int*)malloc(1*sizeof(int)); a[0] = 10; a[1] = 20; a[100] = 40; printf("%u",a[100]); [/CODE] I have created a pointer named a and allocated 'single' int space for it but still i can store and retrieve more than that. This code runs. Then what is the need …

hello everybody, please help me in solving the problem of finding the XOR value of 4 bits as i require it in my project. i tried ^ sign, but it doesnt work for four variables? kindly help

Hello everyone, I've been having a problem with some of my scanf() functions being skipped after I input a string with a space in between (e.g Jack Daniels). I've been trying to fix it, but it has been driving me crazy. [CODE]#include <stdio.h> #include <stdlib.h> struct Student { int studentNumber; …

i got no idea how to correct the error,can help me? this is a chem quiz that contain 20 question but i need to random everytime 10 question,other than this,also have a calculator,& mini games [CODE]#include<stdio.h> #include<math.h> #include<stdlib.h> #include<time.h> #include<windows.h> int main (void) { int option,question,i,count,z=0; char choice,game,quit; int selection; …

Greetings. I'm currently implementing small ANN on my microcontroller. I need to calculate sigmoid activation function. The problem is that I cannot use standard c libraries like math.h so I need custom written pow function. This is how it will be used:pow(e,-(someFloat)); Did anyone have already implemented something similar ?

hi when i try to use atof i get different values every time i run my app code: [CODE]#include <stdio.h> #include <string.h> #include <math.h> int main(int argc, char **argv){ char* a = "100"; double b = atof(a); printf("%f", b); }[/CODE] why do i get different results everytime i run my …

Dear all, I'm a C beginner and I was doing a small practice nested loop on C when I got a very strange error which when the console opens tells me that my program has stopped working. here is the code: [CODE] #include <stdio.h> #include <stdlib.h> #include <math.h> #include <string.h> …

is it possible in C to do an unfix size array like in Java ? if so, howto ? thx guys Dark

Hi, I want to filter .BMP image with 3x3 digit matrix. Basicly it is multiplying image pixels by numbers in matrix. Any suggestions how it should be done? I know that i have to open a file using fopen() I did that. Should I just loop through whole image and …

im writing a chat server in c and am need help. my server can write to a socket, the client can read from the socket. How do i have the client write to the socket and have the server read from the client socket? server.c [CODE] #include <stdio.h> #include <unistd.h> …

Dear All, I have a function with input parameter as const u_char *p. So when I write like this printf("\n\n Char value p : %.2x",(unsigned int)p[1]). It gives me a hex value. How to print the whole p value which method is best to use. I need to analyse it …

Hi guys, I'm trying to develop a card program, which seems to be working fine, with the exception of the dealing part. The deck is initialised, shuffled, then is supposed to deal out 5 cards without duplicates. However I keep seeing duplicates when I deal. I've ran though it countless …

Hi, I have a task to perform which all to do with the smurfs, reading from a file and doing some simple stuff to it. The last part I need to do is print out a list of all smurfs and their corresponding role in alphabetical order. I am hoping …

for example, i want to combine two number 6 and 8 and it will equal 68. is this possible in C? [ICODE]int a = 6, b = 8,c; c=ab; [/ICODE] and c will = 68.

Hey, I get confused when dealing with the static scope and dynamic scope, and for this pseudocode I have to find both. For static I believe it should print out: 9 4 2 3 however, I'm not entirely sure. Any help would be appreciated, thanks. [CODE]Procedure main g:integer procedure B(a …

Hello; For the below program, I am trying to create a procnanny program which will monitor the processes according to the specification said in a configuration file. The parent process will create fork() child processes each for monitoring a process as specified in the configuration file. The configuration file is …

[CODE]void merge() { if(start==NULL) { start=start2; } else { temp=start; while(temp->next!=NULL) { temp=temp->next; } temp->next=start2; } temp=start; if(start==NULL) printf("\nList is empty"); else { printf("\nElements of the list:\n"); while(temp!=NULL) { printf("%d\t",temp->info); temp=temp->next; } } system("pause"); system("cls"); main(); }[/CODE] the following code is use to merge two linked list into one and …

Hello. i was trying to solve this problem: [B]You’re given an array containing both positive and negative integers and required to find the subarray with the largest sum (O(N)). Write a routine in C for the above. [/B] i was able to find the largest sum. However,i had little trouble …

I have this code: Note: boom.ok[1][0] has the character "a" while boom.ok[[tempr[0]][0] contains the string "ay". [CODE]if ( strcmp(&boom.ok[1][0],&boom.ok[[tempr[0]][0]) == 1) printf("Hello"); if ( strcmp(&boom.ok[1][0],&boom.ok[[tempr[0]][0]) == 0) printf("Hello");[/CODE] None of these statement prints hello. Why?

C program to replace all the letters of a string with all 26 alphabets and to do permutations to all the substituted ones and finally store the resulted strings in a file.. please help me out in fixing this situation.. To be clear. let me quote an example: If i …

i m having trouble with updating the fie. every time the code is executed, the variables are not retrieved from the file and start from the scratch. moreover, the file is not updated. plz reply

Hi, so I have this assignment to create a scheduling algorithm, I tried looking everywhere for help on how to create one and the closest one was here, where I found a great source code, yet I tried to modify it with my assignment variables and I created some nasty …