19,876 Topics
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| | How to make an application to prevent itself from launching from the command line? I have a binary which should be launched by a daemon; but when somebody tries to launch the binary from command line, I should error out stating "cannot be launched from command line". Tried googling but … |
 | hi can anyone please help me with this problem arranging given input that is alphanumeric in ascending and descending order using turbo c *note the given info are char only example output: info to be arranged: blk4 lot 32 ascending order: bkllot234 descending order:tollkb432  |
 | hi i am adjusting a socket program code to make it able to read and write on files and send and recieve packets but i am stuck it only performs the first while loop and doesn't go to the next lines to execute them ! i dont usually program using … |
 | Hi guys. I am a student who really needs some assistance with creating a recursive function in C that changes multiple consecutive white spaces (blanks) from an array of characters into a single blank. For instance: char c [10]; // let ␢= blank symbol where the contents are :␢␢␢␢INT␢␢␢ the … |
 | Ok, it's a pretty dumb title but represents well what I need to know. I'm pretty much a noob in programming and I found a problem about finding the first 3 perfect numbers. I got it solved, but I wanted to see how far I could go. My computer can … |
| | Hi, I was trying to browse through the contents of an SD card containing the FAT16 filesystems using a HEX editor. I was looking up a person's program to navigate through the filesystem i.e. reading the master boot record, boot sector etc and he has used a "long" for fields … |
| | Hello! I have a problem about creating a menu, the switch statement doesn't break. Could somebody please help? The code is: do { /* ...get input... */ switch(choice) { case 1: submenu(); break; case 2: submenu2(); break; case 3: printf("\nThe program quits.\n"); exit(0); default: printf("\nNo such menu item!\n\n"); break; } … |
| | I need to multiply 2 matrices together using threads to computer each element. Ive been working on it myself but Im stuck at this point and Im getting an error. Here is the code I have. Can someone help in explaining what is wrong here or how to correct it? … |
| | a. Write a C program to open and close a file given its name. Your program must check whether or not the file exists. b. Add a function for reading an opened file into an array of characters. You may assume the array is large enough to hold an entire …  |
| | Hi, i would like to calculate the execution time of my program. is there any function available to enable it?? |
 | Hello, I am trying to divide my dataset(iris dataset) into training and test sets randomly. My dataset contains 150 patterns. And I need to divide 90 patterns to test set, and the rest to training set. How can I do this? Help me with the C code. Thank you |
| | I got this snippet of code from a larger program I've been writing and I'm stuck. All I'm trying to do is read from a file line by line but I keep picking up the new line character, at least that's what I think it is. #include <stdlib.h> #include <stdio.h> … |
| | hi i am trying to copy the returned value (not really the returnd pointer but what it points at) from function gets but its not working and when i try to print it or print the str_infile before strcpy function , its not printed out !! i added temp_buff before … |
 | main() {--- ---- ---- } main(int a, char **b) {--- --- --- } main can be used in the both the ways in c but if there is no concept of function overloading in c how can the above be achieved.  |
 | Finding some text and replacing it with new text within a C string can be a little trickier than expected. Here is what I had come up with one day. |
| | I am having trouble having redirection working with the ability to hit enter and remain in the same shell. My problem is if user types: ./a.out < foo.txt (where foo.txt contains a command like date) I want to execute that command and exit the shell.However,if the user compiles the code … |
| | Assignment 1: Simple Text Editor using C programming in Linux Environment The goal of this assignment is to help you practice c programming. A tutorial on Linux commands and c programming is given at the end of this assignment. Resources/examples of c programming is given in Moodle and further help …  |
| | I am trying to devise a program to scheduling "events" onto 3 different stages using dynamic programming. I have a start time a finish time and an interval associated with each event. int max1(int x,int y) { if (x>y) { return x; } return y; } int max2(int x, int … |
 | I'm very confused about void pointers and this notation here below. I do understand that when you have a void pointer you eventually cast it to some kind of type int, double. What I don't understand is what is happening here : copySize = *(size_t *)((char *)oldptr - SIZE_T_SIZE); copySize … |
| | Server code part: void spawn (char* program, char** arg_list) // Executing the clients command { printf("\n\nprogram = %s\narg_list = %s\n\str1=%s!!!\nstr2=%s\n\n",program,arg_list,str1,str2); dup2(s2, STDOUT_FILENO); //Redericting information to socket dup2(s2, STDERR_FILENO); execvp (program, arg_list);abort (); // Executing the clients command - After this, program gets stuck, why? /* if (send(s2, "This works multiple … |
 | Hi guys/ and the minority of girls. This topic is for my teacher, who has asked me to find information of the following for himself. How can he interface a USB port to run a motor through C++? He is relatively good with computer systems himself, so why he does … |
 | Literally, I have been asked this question ""The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, … ; the first two terms are 0 and 1, and each term thereafter is the sum of the two preceding terms – i.e., Fib[n] = Fib[n – 1] + Fib[n …  |
 | I think that the main problem on my code is that iam trying to pass a struct through another struct . Is there a problem if i use "->" instead of (*). ? Because it keeps showing me an error that say's : invalid type of argument '->' Iam trying … |
| | Hello! I'm new here, and I need some help. :) I am working on a program that has to write and read a binary file. I have to add lectures to it, they look like: **COURSECODE;COURSENAME;MAXAPPLICANTS;ACTUALAPPLICANTS;** I could write that in a file without any problems using `char*`. My question …  |
 | what is the difference of passing an array to a function like this function(int x[]){ } or like this(int x*){ } what is the difference both ways seem to work |
| | My friends are keep telling me "Use debugg idiot !" I found out that for a code over 200 lines is very important. But i want to debug only a specific piece of code. And to review the results of a variable while the code is "executing" . Is this … |
| | I am trying to read a structure from a .dat file...the first integer to be read is the no of readings, then there is the data in following structure format struct Oven { int rec_no; int temp; int status; char string[10]; }; below is the method through which I read …  |
| | I am trying to make a compiler for my project using C but I have a problem on how to store the contents of the text file into an array or something similar so that my program can compiler or analyze my txt (code) file. Here is what I have … |
| | Was not sure where to post this, but let this a go. I m on my final year. And I have discovered in myself a passion for programming in C and started learning it but it is all in a beginning stage. I really bored of Java or I just … |
| | I'm new to c# programming, and I am a little stuck on how to make a variable available across multiple forms. I read that i should make a public static class, however, my code is as follows: private void btnLogin_Click(object sender, EventArgs e) { accountNo = txtBoxAccntNo.Text; valid = validate(); …  |
| | Hello All, First - I am just a beginner at this (just started studying C++ this semester) so I am lost somewhat sometimes and I think I am making good headway with my first array, but, I can not get it to return any output in my console window. I'm … |
| | Is it possible to declare an array with a variable as its index value, so that the user himself/herself can enter the exact number of items required....?? |
| | Hi guy, I have been teaching myself how to write C programming code, right now am learning the Round Robin Sheduling algorithm, below is the code that i have managed to write, its the basic but i could do with your help or your direction with how to do the … |
 | hello guys ! I need some help.. "assume that the process happen in some restaurant. there are seat1 until seat10 in the restaurant. the customer(user) need to enter the seat number to select the seat that they want. the seat that have been selected by customer will remark by 'reserved' …  |
| | I'm having issues with some code that I'm writing for a class homework, which is to write a simple shell for linux. I was wandering if anyone knew a way to convert a char* to a char** in a better way that what I am using. Currently I'm accepting in … |
| | i have an integrated project to build a robot and direct its path via C language im reallly out of this field ! can u just tell me with an idea of basic functioning ! i know this is a c# forun ! but ill be glad if you can … |
| | Hi there guys. Literally I have been asked this question; "The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, … ; the first two terms are 0 and 1, and each term thereafter is the sum of the two preceding terms – i.e., Fib[n] = Fib[n – … |
| | I am learning about compilers right now and search for a source code in C as my guideline to better understand how it works. I found this online from this link [Click Here](http://www.programmersheaven.com/download/16060/Download.aspx) and the code is quite long. Even there are comments in the code, I still find it … |
| | I'm trying to extract the value of the coeffecients and the exponent from a polynomial. I have already succeeded in extracting the coeffients using strtok. I applied the same concept to find the exponent, but I don't know how to use strtok to extract the string AFTER the delimiters or …  |
| | write a program which display a restaurant menu, then ask the user to select a choice from the menu. Using the switch statement select the user choice. printout the choice the user slected and the bill amount.Include in the bill a 16.5% tip and 8.25% sales tax. |
 | Hey everyone need help on a project im doing in c++, so far I have made a command interpreter, that breaks user input into array of Strings sepperated by spaces and have a run function. Now I am trying to do the list() and list(directory) but I'm not quite sure … |
| | I am writing a program to divide my entire database (which comprises of words(A-Z) and phonemic definitions of the corresponding word on the same line) into small text files that become manageable if they are to be read by an 8-bit microcontrolling unit. The database is sorted. Right now at … |
 | Hello, i just started to study c++ and i have a problem about 1 porgram in the homework ! it ask me to write a c++ program that first asks the user if he want to enter a number if yes he enters the number and then ask him again … |
| | Hi, this code is compiling successfully, but giving "segmentation fault" when I am trying to copy data to shared memory. Please tell me where I am wrong. Thanks a lot............ #include<stdio.h> #include<sys/ipc.h> #include<sys/shm.h> #include<sys/types.h> #include<unistd.h> #include<stdlib.h> #include<errno.h> #include<string.h> int main() { int id=-1, status=-1; char *check=NULL; char *p="you"; const size_t … |
| | Please can someone help me and send me in the right direction. I am making a program that reads a text file and then out puts the data into a datagrid, the text file looks like this: [HRData] 84 73 0 -124 0 50 84 73 0 -124 0 50 … |
| | Hi, When i debug the program using gdb , the gdb is entering the definations of std lib functions (ex: printf, strcpy ect) and other internal functions. Initially the debuger was working fine, i dont have clue when it got changed.I guess some of the flags of gdb might have … |
 | **the SJN and the FCFS will not continue to answer the problem...** **when i choose one of the task listed (SJN and FCFS others are not filled) it proceed to inputting value,** **after inputting the data it exitS or stop.. help me to display the answer..** #include<conio.h> #include<stdio.h> #include<math.h> int …  |
| | # **I am installing OpenCv using these steps:** # Building OpenCV from Source Using CMake, Using the Command Line Create a temporary directory, which we denote as <cmake_binary_dir>, where you want to put the generated Makefiles, project files as well the object files and output binaries. Enter the <cmake_binary_dir> and … |
| | in using turbo c++ IDE i got this error in void main() #include<conio.h> #include<stdio.h> #include<math.h> void main(){ input_data1( ); }int input_data1(void) { int input; printf("\n\n**************CPU Scheduling*************\n"); printf("|\tChoose CPU Scheduling:\t\t|\n|\t1. Shortest Job Next\t\t|\n|\t2. First Come First Serve\t|\n|\t3. Round Robin\t\t\t|\n|\t4. All CPU Scheduling.\t\t|\n*****************************************\n"); scanf("%d",&input); return input; } void display() { input_data1(); } |
| | Hi, I have this code in C for Flex/Lex, the only problem is that as I try to compile it it shows some errors and I dont know how to fix them. letter [a-zA-Z] digit[0-9] %% {digit}+("E"("+"|"-")?{digit}+)? printf("\n%s\tis real number",yytext); {digit}+"."{digit}+("E"("+"|"-")?{digit}+)? printf("\n%s\t is floating pt no ",yytext); "if"|"else"|"int"|"char"|"scanf"|"printf"|"switch"|"return"|"struct"|"do"|"while"|"void"|"for"|"float" printf("\n%s\t is …  |
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