[c] Forum Topics

I am learning C. After completing the common core part. I found this unique program which will allow the user to create his own format specifier which will use "%b" as format specifier to convert a integer directly into binary. I want to know more about this code. How it …

i having problem saving a txt file and printing it back out , i have the hints of using fgets(v[i],14,infile); and sscanf(v[i],"%d: %s %s,%x"%line_num[i],inst[i],reg[2],reg2[0]); i have no idea on how to imply this correctly can someone show me a correct implemtation of the code so i can move forward to …

int main() { float i=0.3; ....... ........ if(i<0.3) printf("ishq\n"); else printf("hello\n"); return 0; } hi, can anyone please explain why i am getting output as "ishq" even if i=0.3 so if condition must be false. pleas help i am not getting it. thanks.

We are running a C program where for every one second there is a function callback. Below is the snippet of the code listed. It is ran over every second without missing so we notice sometimes when is busy doing the insert part and the next select is up and …

So I'm trying to write this program in C that will take a message the user types in and encrypt it using an RSA public key that the user supplies. I know there are encryption functions and libraries in C but I want to actually recreate the algorithm in code …

This below code is the code minimized of real code. Is posible synchronize a global variable with pthread and main while(1)? On the below code, the printf not apper in order and delayed of the 1 second. #include <pthread.h> #include <stdio.h> pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER; int teste; void *ThreadFunc(void *arg) …

I need a code which can solve the equations like this :- 56*78+(78/8) In this we know that brackets must be solved first and then divide/multiply and then add/subtract. So, i need a code for solving this kind of equations which contains multiple operators in single line. Thnks :)

anyone know how to print this output ???? using three for loop ***** **** *** ** *

hi, My question is about the const keyword. union emp { char name[]; int age; float salary; }; const union emp e1; int main() { strcpy(e1.name,"H"); printf("%s",e1.name); e1.age=45; printf("%d",e1.age); printf("%f\n",e1.salary); return 0; } I know this code has error which is that "cannot modify constant objects". But Can anyone tell …

hi, int a[][2]={1,2,3,4}; int *p[]={(int*)a,(int*)a+1, (int*)a+2}; for(i=0;i<2;i++) for(j=0;j<2;j++) printf("%d ",*(*(p+i)+j)); Firstly, This is part of any code. And i want to ask that in *p[] definition, why it is written (int*) with every element since a is already an pointer. Secondly, when I am accessing *(*(p+1)+1) element in loop, then …

How to define multiple characters using macros?? I want to declare all the hexadecimal digits under a name "hexa". Does anyone know it how to do that?? The below code is wrong! Any suggestions to make it correct?? #define hexa 'A','B','C','D','E','F','0','1','2','3','4','5','6','7','8','9' #include<stdio.h> int main() { char a; printf("Enter a character= …

I'm writing a program in MARS that encrypts/decrypts a string with a simple addition/subtraction method to each character according to a 4 digit key such as '2848.' I'm now trying to navigate through each character in a string and just increase the decimal count by 1 just to test it …

Why the program is running without line 14? #include<stdio.h> #include<iostream> //#include<conio.h> //#include<math.h> #define FOR(i,a,b) for(int i=a;i<b;i++) using namespace std; int main() { int a[]={1,2,3,4,5,6,7,8,9,10}; int *b; //b=(int *) malloc(sizeof(a)); b=a; //cout<<b; FOR(i,0,10) cout<<b[i]<<" "; //cout<<sizeof(b); //getch(); return 0; }

Hey ya'll I was looking for some guidance. I'm building a "workout generator" for fun and got stuck. I want my program pick a random assortment of exercises and write them to a new file. What is the best way to randomly pick strings from a list of exercises; jump …

hello, I am learning C from past 1 year, Now, I want to improve my coding skills by learning techniques like dynamic programming, backtracking and all that stuff. Can u please tell me or give me links from where i can learn, practise and improve these skills ? please help …

what kind of concepts must be taken up for mini projects by students,especially for their first project...??please reply...

I'm having difficulties writing the rpc function. Specifically, I don't know how to pack a function name and input argument into a message body, send the message, set and unpack reply, and return result and error code. I know how to create the socket, request aconnection from the server etc. …

I know it's a bad practice to post the same question on more than one help site (I posted it on Stackoverflow, but after some time your question loses its place on the "active" list and people stop reading it) but I'm really desperate here. So my question is: I …

#include <iostream> using namespace std; int answer(int x,int y); //function proto int mutab[10][12]; //two dimentional array declaration int main() { for (int i=0;i<1;i++) //this will fill 1-10 of the multiplication table { for (int h=0;h<10;h++) { mutab[h][i]=h+1; } } for (int i=0;i<10;i++) //this will fill 1x1,1x2,1x3 etc.. to ......10x11,10x12 { …

i would like to start data structures in c langauage.but i dont know even what is data structure and 0% about data structure.can u suggest me some books for data structure in c?????

I am doing following code to get the output upto 5 decimal characters of any number inputted by user when divided by 1, I have to use typecast it with (float) , can any one tell me how this can be done without typecasting or using float constant.. int main() …

While not terribly difficult, first timers may not know the functions to look up and use. Here is some basic code for reading a file one line at a time. The contents of the file are printed to the stdout.

I have a problem, actually I want the software i created, to be little private. Hence, I thought of using MAC address, but I'm Unable to retrive the MAC address using C. I surfed on the internet and found the code to retrieve MAC address in LINUX, but i want …

I want to learn how to use preprocessor #pragma in C? can anyone please help me to understand..

To Shift the Three Numbers a,b,c in Circular order

Hi, I have a problem in data structures I am stuck in this one .Please try to help me. Question : A man Joe has a habbit of eating pancakes & driving bikes.Once he went for outside by his bike,now he is EXACTLY IN THE MIDDLE OF A ROAD his …

Please help me to make a program in turbo c that will let you guess the password. but if it is wrong the program will ask you do you want to continue y or n ,if y it will display again what is the password if no end the program

hi, 1. actually i was reading some text from my book and i come across this expression. I am not getting what it means. here it goes, typedef int (*HIG) (int,int); And "sizeof" can't be used in #if because the preprocessor does not parse type names. What this statement means …

I came across [this](http://www.daniweb.com/software-development/cpp/threads/189901/screen-capture-program) program in the C++ section. How to do something similar in C? Let me elaborate. I want to read the colour values of individual pixels in at the rate of at least about 25Hz. I have a nVidia GeForce GTS450 graphic card and Windows 7 64-bit/Linux …

Sample Input: 20 10 2 5 2 Sample Output: 2 Explanation: An amount of 20 could be made in 2 ways: 10*2 10*1 + 5*2 I want to find out the number of ways a particular amount can be made with given coins.In the sample input 20 is the amount …

Hi, I am trying to write code to read a text file containing velocity vector data in the form x, y, u, v. An example of the data file I am opening is: 0 1.0 3.24 45.64 1.5 2.5 54.34 23.45 ... I have a function which can read the …

Hi, Can anyone help me out in the below issue. My requirement is,,i have to take an xl sheet as input in the program with 2 columns student name,student address and some 20 number of rows for each column. i have to take another input file also i.e a log …

Hi, I got a problem in reading and write on file. I have to create an virtual agenda, therefore I enter a name and a number for N persons. After entering the infos if the file doesn't exist, the program create it and save the infos, if the file exist …

What c framework are you people using to develop a game written totally in c? Mind to share?

Im not really sure where my program has gone wrong and would be thankful for any help provided. It compiles and runs up until the first function is called then crashes however I have tried multiple ways to fix it such as different names, changing the return values, changing the …

Let say you have came out with a software written in c is there anyway to insert a clickable icon on your desktop so you can run the program on windows desktop? c is very good but we need to get a clickable icon so we can run our software.

I am having trouble compiling this program, I have just about everything written up but the compiler errors are keeping me stuck at a standstill. In the WRITEARRAY and READARRAY function are where the main compile errors are giving me subscript is not of integral type and this is making …

I need help writing a c program to run in Unix that uses pthread library to create a thread that computes the fibonacci numbers. I should provide a parameter to the thread indicating which fibonacci number to return and use pthread_join to wait and collect the returned value and lastly …

> what exactly is char **?? how is it used in getline function?

HI, how can i integrate these both code mentioned below so that the output displayed on the black edit box must be as:(2+2)/2+2*3=8 here is the code of BODMAS calculation: #include <stdio.h> int calc(char *exp_str){ FILE *fp; int ret; fp=fopen("calc_aux.c","w"); fprintf(fp, "int main(){ return %s; }", exp_str); fclose(fp); system("gcc calc_aux.c …

Hi all, I have a very large file so I want to dynamically allocate the memory of a 2d array and then fill it up with the file inputs. Before i used malloc to make the 2d array, everything worked fine (I was using a practice small .txt). However, i …

need help for this question Calculate the biggest of four integers. The user inputs four integers. Your program will determine the biggest of these four numbers and print out an appropriate message, specifying this biggest value. You are required to implement and use the following functions for this task: int …

First, i'm new to C and trying to teach it to myself so be gentle. All i'm trying to do is malloc a block of memory so that i can store a few strings. These strings are to be pointed at by an array of pointers so that as i …

lets say I make a shortcut to a file that exists ln -s ex7 ex7_shortcut now I have a C program that checks and finds that ex7_shortcut is a symbolic link and changes it be placed at "currFolder/links/" ("currFolder/links/ex7_shortcut") 1) how (if possible) can i fix the symbolic link to …

This is more of a rhetorical question, but... ... how is the article [Flame on: complex LUA and C++ cyber weapon fired at Israel, Iran and Syria](http://www.daniweb.com/software-development/news/424377/flame-on-complex-lua-and-c-cyber-weapon-fired-at-israel-iran-and-syria) related to [C: Access violation 0xC0000005:](http://www.daniweb.com/software-development/c/threads/427477/c-access-violation-0xc0000005#post1829060)???

Hi I would like to make cgi-bin program which will make dynamic pictures. I know how to make cgi program which would output simple html file #include <iostream> using namespace std; int main(int argc, char* argv[]) { cout <<"Content-type: text/html\r\n\r\n" << endl; try { cout<<"<html><body><h1>Test</h1></body></html>"<<endl; } catch (exception e) { …

Hi, i need an help for an error. When I run this code it crush, with this error: Unhandled exception at 0x77da331f in ES_7.exe: 0xC0000005: Access violation reading location 0x00000004. Process returned -1073741819 (0xC0000005) I translated some parts of the code to better understanding NB: When I run this code …

Hi, i'm programing in CodeBlocks (http://www.codeblocks.org/). I would like to add Dlib (http://dlib.net/) library to my project. How can I do this? I went to my project "Build options..."->"Search directories"->Compiler and added path to "dlib" folder. I did the same for "Linker" and "Resource compiler" (more info abaut adding libaries …

# problem with code for converting decimal to other bases # when i give any input, a window appears saying "**a problem has occured, windows needs to close**"  i cant understand what im doing wrong here. any help will highly appreciated :) this is my code: #include<stdio.h> #include<conio.h> …

been trying to google it for a while now but didnt help using the " "... anyway i need to do a recursive search inside a sub tree of the file system. given a folder A , I need to go through all of its sub folders. so far the …