[c] Forum Topics

Hi I am totally new to C programming (been using java for about 1 year) and have a question about pointers/linkedLists. So what i am trying to do is create a linked list and insert a new node as the head of the list...below is my code: The error I …

what is the difference between procedure and functions??

Hi everyone, I am not getting how to enter values to that array. Please some one give me a solution. typedef struct user { int array[10]; }user; void main() { int i; user *tmp; printf("enter array values"); for(i=0;i<10;i++) { scanf("%d",&tmp->array[i]); } for(i=0;i<10;i++) { printf("[%d]\n",tmp->array[i]); } }

I have the basic knowledge of C Programming i have learned till Command line Argument programms and now i need the knowledge regarding the database connectivity.So,can anyone help me with the same.

Hi, I was programming with POSIX threads and I was using semaphores. All of a sudden the program didn't work anymore, and I started searching for the problem. It turns out that my first semaphore command "sem_open()" causes the problem. It returns value "0", or "SEM_FAILED", and sets errno to …

Hi Folks, I have written a read function which reads values from serial port(LINUX) . It returns values as pointer to char . I am calling this function in another function and storing it again in a variable as pointer to char . I occasionally got stack over flow problem …

Just Started C in University, first time doing it and the first program i had to write was one that required someone to be able to enter 5 random numbers and get the average of the 5 numbers, the highest/lowest of the 5 numbers and then finally the standard deviation …

I have been racking my brains to find what's wrong with my code... been playing with it for an hour or so but it seems to still be wrong.. Please anyone can point out the mistake? Im so frustated right now.:yawn: the answer to the question is 21124, but this …

[CODE]#include<stdio.h> void string_copy(char str1[],char str2[]); int main() { int i; char str1[10],str2[10]; printf("please enter a name(string 1):"); gets(str1); printf("please enter a name(string 2):"); gets(str2); string_copy(str1,str2); printf("string 2 copied to string 1"); for(i=0;i<10;i++) { printf("%c",str1[i]); } return 0; } void string_copy(char *p1,char *p2) { int i; while((*p2)!='\0') { for(i=0;i<10;i++) { *(p1)=*(p2); …

[CODE] #include<stdio.h> #include<stdlib.h> int **transpose(int **x,int m,int n); main() { int nrows=2,ncolumns=2,i,j,k=0; //memory allocation for array x int **array; array = malloc(nrows * sizeof(int *)); if(array == NULL) { printf("out of memory\n"); return 0; } for(i = 0; i < nrows; i++) { array[i] = malloc(ncolumns * sizeof(int)); if(array[i] == …

Hi i'm in a university class, and i'm working on a little assignment that is supposed to have an int array and have assorted functions to do things to the array currently i have two of the four functions working and i'm having trouble with the function that is supposed …

im trying my hand at calling c functions from python. im reading up the tutorial [URL="http://csl.sublevel3.org/C-functions-from-Python/"]http://csl.sublevel3.org/C-functions-from-Python/[/URL]. however part of the tutorial says that i should [QUOTE]Compiling dynamic libraries on Mac OS X is different from the usual gcc -shared you might be used to: gcc -dynamiclib -I/usr/include/python2.3/ -lpython2.3 -o myModule.dylib …

I'm using microsoft visual studio 2010 express edition, and am trying to install a new library (pdcurses). I have all of the header files in the correct folder, and the library correctly includes. However, if I use any functions from the library, I get linker errors about "unresolved externals". Do …

Why is float called single precision floating point and double as double precision floating point?

i have this to check for numeric inputs, which returns then menu if a number is entered less or grater than 5 but how would you do this with alphabets ? for any alphabet or any other charterer apart from numbers should return the menu [CODE] while (select < 1 …

How to send EOF on console in linux?

hi! i'm beginning to like C, i find it very challenging. and i have this problem, that confuses me here: Construct a C that will accept 5 digit number, determined the reversed number and display the message "equal" if the original 5 digit number and the reversed number is equal, …

Hi all, I have a proplem when embed shell into C code by Sytem() command. There is my code: [COLOR="Green"]char acCommand[512]; acCommand[0] = '\0'; sprintf(acCommand,"sed 's/\<UDN\>\<\/UDN>/\<UDN\>%s\<\/UDN\>\/g' %s > %s", initParam.UDN, "/tmp/web/dmr.xml", "/tmp/web/dmr.xml.tmp"); printf("[%s]", acCommand); system(acCommand);[/COLOR] and below is output after compiling: sed 's/<UDN></UDN>/<UDN>uuid:b346ee95-93b3-4922-a132-cf72762b9318</UDN>/g' /tmp/web/dmr.xml > /tmp/web/dmr.xml.tmp] [COLOR="Red"]sed: bad option in …

Can I do unit testing C using visual studio 2008 Thanks Best Regards

I have created a dll and I want to use its functions in my other projects using Visual Studio 2008.Kindly Help...:icon_sad:

Hello everybody, I'm making a scoreboard with uart and 7-segment multiplexing and I've got a problem. When I receive code from the UART, multiplexing doesn't work any more. And when I'm multiplexing with timer1, the UART_receive doesn't work any more. Please look at my code below and help me. Best …

hi, i wrote an assembly code in my c code but i don't know how to use c declared var in my assembly,if someone could help me :) thx

[ICODE]Hi, I have written the program below and the compiler is not giving any error message and when I run it, the first request for an enter is almost always followed by strange numbers,which I don't know where they come from[/ICODE] [CODE] #include<stdio.h> int main() { int value; int inputs; …

This code from C++ to Turbo C [ICODE]#include<stdio.h> #include<conio.h> public class Stack { private: int size; int top; int *values; public: Stack(int size) { this->size =size; values = new int [size]; top = -1; } void main() { Stack *myStack = new Stack(10); } }; [/ICODE] what will be its …

Hello fellow c programmers( I made a "hello world" program so I'm a c programmer too :) ). Anyway I want to know if there is anyway to make a Dev C program perform an action if it is a certain day such as printing the schedule for the day …

[code] #include<stdio.h> #include<stdlib.h> #include<math.h> #define pi 3.14159265 int **transpose(int **x,int m,int n); int **matrix_mul(int **m1,int **m2,int r1,int c1,int r2,int c2 ); int **dc4(int **x,int nrows,int ncolumns); main() { printf("hi"); int nrows=80000,ncolumns=1,i,j,**x,**dc4_x,**ix,M=nrows,N=ncolumns; //memory allocation for x x = malloc(nrows * sizeof(int *)); if(x == NULL) { printf("out of memory\n"); return 0; …

Want to know how to fix an election without resorting to bribery and corruption? Ever thought about throwing some Return Oriented Programming into the voting equation? Ordinarily, the hacking into of an electronic voting machine might spark a little bit of interest if there were an election looming perhaps. That …

[CODE]#include<stdio.h> #include<conio.h> #include<math.h> void hanoi(int x, char from,char to,char aux) { if(x==1) { printf("Move Disk From %c to %c\n",from,to); } else { hanoi(x-1,from,aux,to); printf("Move Disk From %c to %c\n",from,to); hanoi(x-1,aux,to,from); } } void main() { int disk; int moves; clrscr(); printf("Enter the number of disks you want to play with:"); …

Hi everyone I need a general formula that is used for finding the determinant value of a NxN matrix.. please help me out...........

I have an assignment due tonight. I am in the hospital with kidney stones and in much pain! I brought my laptop but am kind of out of it. Could someone please help so I do not get a bad grade, please! This is for a module of an electrical …

Kind of programing in general question but I'm doing it in c so I'm posting in the c forum. My class is dealing with VCards and my prof talks about a process call "unfolding". I have no clue what this means so can anyone give a quick briefing or point …

I need to calculate the area of a triangle using this formula. What is wrong with my code? error C2063: 'p' : not a function [CODE]#include <stdio.h> void Area(int a, int b, int c) { int p = a * b * c; int area = (p(p - a)(p - …

I coded a simple program that pretends two users input random characters and the program tells you which user wrote what [CODE]#include <stdio.h> int main(void) { int x; char user; char ch; puts("type a character"); for(x = 0;x < 9; x++) { if(x%2 == 1) { user = 'x'; } …

I have posted in some other forums and im sorry for people who have already seen something like this from me, but i was hoping if i could get some different views and opinions. I have probably very bsic computer knowledge and no programming knowledge, however, i have recently took …

The following program compiles (using MS Visual Studio 2010) with no errors or warnings and runs without any error, why? Thanks in advance for explanation. [CODE]#include <stdio.h> int f[3] = { 1,2,3 }; int g[4] = { 12,45,55,65 }; int main(int argc, char *argv[]) { printf("%d\n", f[5]); return 0; } …

hi all..my project is to design a partial C compiler(output shud be d 8085 code).i an new to this..theoritically i hv read a lot bt practically i dont knw 4m where 2 start..i m using flex bt facing problems with dat even..can sumbdy provide guidance..i'll b grateful.thank u

Hello! So this is pathetically easy as programs go in the C language (i hope). I am working on a variation of the Hello World program (as I am just starting to learn C, solo). I am using the C All-in-One for dummies book, and I got a little ways …

I am trying to print a rectangle using this symbol *. When I print it, it draws an L. What is wrong with my code? [CODE]#include <stdio.h> void rect(int base, int height) { int x = 0,y = 0; while(x < height) { x++; if(x == 1 || x == …

[CODE] #include<stdio.h> #include<stdlib.h> int **array(); main() { int **result=array(),i,j; //display result for(i=0;i<2;i++) printf("\n"); for(j=0;j<2;j++) printf("%d \t",result[i][j]); } //function int **array() { int nrows=2,ncolumns=2,i,j; // printf("hi"); //memory allocation int **array; array = malloc(nrows * sizeof(int *)); if(array == NULL) { printf("out of memory\n"); return 0; } //printf("hi"); for(i = 0; i …

[CODE]#include<stdio.h> #include<conio.h> #include<dos.h> #include<stdlib.h> void main() { clrscr(); while(!kbhit()) { struct time t; gettime(&t); textcolor(random(15)) ; gotoxy(23,3); printf("%d:%d:%0d",t.ti_hour,t.ti_min,t.ti_sec); sleep(1); clrscr(); } getch(); }[/CODE]

Hi everyone! I recently created a MySQL table that has three columns: (1) integer ID (2) integer num1 (3) integer num2 Now, I have a C program that waits for the user to input an integer ID and when there is an input, the corresponding num1 and num2 in the …

[CODE]#include<graphics.h> #include<conio.h> #include<math.h> #include<dos.h> #include<stdio.h> void main() { int gd=DETECT,gm; int x=320,y=240,r=200,i,h,m,s,thetamin,thetasec; struct time t; char n[12][3]={"3","2","1","12","11","10","9","8","7","6","5","4"}; initgraph(&gd,&gm,"C:\\tc\\bgi");//ut the directory which containsegavga.bgi circle(x,y,210); setcolor(4); settextstyle(4,0,5); for(i=0;i<12;i++) { if(i!=3) outtextxy(x+(r-14)*cos(M_PI/6*i)-10,y-(r-14)*sin(M_PI/6*i)-26,n[i]); else outtextxy(x+(r-14)*cos(M_PI/6*i)-20,y-(r-14)*sin(M_PI/6*i)-26,n[i]); } gettime(&t); printf("The current time is: %2d:%02d:%02d.%02d",t.ti_hour, t.ti_min, t.ti_sec, t.ti_hund); while(!kbhit()) { setcolor(5); setfillstyle(1,5); circle(x,y,10); floodfill(x,y,5); gettime(&t); if(t.ti_min!=m) { …

I have a string and i want to copy at specified memory location. Suppose i have a pre-allocated memory represented by char* logFile (unsafe code) I have a generated string which contains the name of log file. I want to copy that string on location represented by char*. Please help …

The following program reads a specified file that contains a list of numbers. The program then prints: Sum, sum of the sqaures Mean, mean of the squares Standard Deviation A table of every number in the file with its difference from the mean and the quantity. A second table printing …

Hello everyone Thanks for viewing this topic for me.... my question is when I tried to check user inputs a valid age it works only if a number is entered. If by mistake user inputs a character value (e.g. any character a to z or any symbol) this loop runs …

Hi in my program there is an option to enter a directory as a command line argument. Is there any check I can perform to see whether this directory is relative to the current working directory? For example if we are /home/user and the user wants to input /home/user/folder they …

so these are my structures: [CODE] struct information { int Id; char name[20]; }[/CODE] that structure I use in my tree structure [CODE] struct node{ information *employee; node *left,*right }[/CODE] and I have a generating function: [CODE] node* generate_tree_from_file(void) { node* tree=malloc(sizeof(node)); employee* emp=malloc(sizeof(employee)); int NoEmployees; FILE *input_file; input_file=fopen("emp.bin","r"); if(input_file) …

Hi there, Kindly see my attached code below. This is already running however, I do have a little problem with the WITHDRAWAL part. For example: My current balance is 500 and I withdraw 501. It will tell me at first that I have insufficient funds and would prompt me to …

An integer is loaded in from memory. ran through two loops to determine the tens place and the ones place. Integer is stored back to memory and displayed. Example #98 Tens place -->9 Ones place -->8 :)

Hello I have a following line inside a .txt file This$is$my$Input$203 I would like to know whether is it possible only to store the 203 value in variable using fscanf. So without declaring char arrays to store all those strings. I was thinking of something like this ; [CODE]fscanf(fp,"%*[^$]$%*[^$]$%*[^$]$%*[^$]$%d",&number)[/CODE] But …