[c] Forum Topics

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 …

I need to know how to work this out, say for example i have a method is C++ that is helloworld(), and i need to call it from a C program. [CODE] // in my C++ program void helloWorld(){ // some code; cout<<"hello world"; some code..... }[/CODE] [CODE]This is my …

I need a method to invoke the ENTER key in the keyboard. I tried this; yet its for return and not ENTER [CODE]keybd_event(VK_RETURN,0x9c,0 , 0);[/CODE] All i want to do is, to press the keyboard key from the code. How do i do this?

[CODE]#include <stdio.h> #DEFINE suntetagmenes 3 double eswterikoginomeno(double dianusmata[][suntetagmenes]) { int j; double eswteriko=0; for (j=0;j<suntetagmenes;j++) { eswteriko+=dianusmata[0][j]*dianusmata[1][j]; } return(eswteriko); } double e3wterikoginomeno(double dianusmata[][suntetagmenes], int i) { double e3wteriko; if (i==0) { e3wteriko=dianusmata[0][1]*dianusmata[1][2]-dianusmata[0][2]*dianusmata[1][1]; } else if (i==1) { e3wteriko=dianusmata[0][2]*dianusmata[1][0]-dianusmata[0][0]*dianusmata[1][2]; } else { e3wteriko=dianusmata[0][0]*dianusmata[1][1]-dianusmata[0][1]*dianusmata[1][0]; } return(e3wteriko); } int main() { char x='m'; …

Hello guys, I have this function: [CODE=c] void swap(char **a, char **b) { char *tmp=*a; *a=*b; *b=tmp; } int main() { char *str1="aaa"; char *str2="bbb"; swap((char **)&str1, (char**)&str2); return 0; } [/code] The program runs and really swaps the two strings. I don't understand why we send (char**)&str1 and (char**)&str2 …

Hello, I would like some help on this one problem in my assignment. I have completed the table but something caught my attention and i feel i did something wrong. I attached the same table i filled out on this thread. I would like help on the first row. My …

hello sirs. im trying to turn two 8-bit hex characters that represent the lsb and msb of an integer. below is the code i am using. i am getting output though im not sure of the validity. [CODE] char a = 0x01; //msb char b = 0x3D; //lsb short int …

hello, please help me with the code for IR CONTROL using ATMEGA128 MICROCONTROLLER IN C LANGUAGE.PLEASE HELP.URGENT. THANKYOU.

Hi all, I'm new to the software package and have written a simple code to turn LED's on/off using a Micro Controller device. When away from the Micro Controller, it would be handy to view the bit orientation (turning on/off) on the computer screen, without the actual device to hand. …

I have a byte array which looks something like 01 00 02 00 73 45 69 A5 So i have to read first 2 bytes and convert it into integer to get its value. Same for next 2 bytes and then next 4 bytes. Here the value for first 2 …

can some one help me why its not copying the file ? [CODE] if(choice = 2) { puts("please open your archive\n"); scanf("%s",&archive); archive_pointer = fopen( archive, "r+b"); //opens the archive puts("please select the file you want to be copied into your archive\n"); scanf("%s",&original_file); open_pointer = fopen( original_file, "r+b"); //opens the …

can we open .jpeg file using c/c++.

I wrote a C++ program that could sendKey. the code is as Follows; [CODE]s.SendKeys(_T("{Enter}"));s.SendKeys(_T("{Enter}"));[/CODE] this piece if code is inside a function. Now, i need to access this method from a C code. When i added the includes, i get alot of errors. Some says, that you can't access C++ …

Hi,everybody.I wrote a program with mikroC for PIC PRO/2009/V2.50 ,to measure a DC voltage input using 16F877A.But it shows the input dc voltage wrongly and uncorrectly[COLOR="Red"];[ it shows 0.014v instead of correct form; 14v ].[/COLOR] I attached my program and its proteus.would you please tell me what is wrong with …

I made this code to solve the following problem. On an island chameleons of different color live. Every Monday , the following events occur The number of Black chameleons born is 1000 more than sum of { existing Blue , existing Green and twice the existing White chameleons } The …

what is meant by pointer

Hi all, I am currently studying for my degree in software development and have just started using java. In an effort to get ahead of the game I have bought some books on c++ and can happily report I have ubderstood everything up until the part about bitwise opertaors I …

My source code is being altered by itself after executing once or when a copy of the source code file is made. If i try to execute the source code the 2nd time it wont work. There will be some error as there are some unwanted ASCII characters like rectangle,smiley...etc …

Hi everyone. I have a very simple question about converting strings(in hex) into signed integer number. I use strtol, but it does not work at all. char code[]="FFFFFFFF"; int m; m=strtol(code,NULL,16); printf("%d\n",m); but the result is not -1 How can I manage this in C? Best regards.

#include<stdio.h> #include<conio.h> #define MAX 5 void initialize(int a[], int n); void display (int a[], int n); void input (int a[], int n); int sum (int a[], int n); int largest (int a[], int n); int smallest (int a[], int n); void main (void) { int array [MAX]; int total; initialize(array, …

Hi, I have a little bit of a problem with my client / server apps. I'm trying to build a simple program that resembles a small instant messaging app. So far I've been working on the "user login" and "status change" parts, along with a query to get the status …

[CODE] while (choice != QUIT) { choice = get_menu_choice(); if (choice == 1) { while(1)//while loop that i want to break out of { puts("please give your archive a name and a path:\n"); scanf("%s", &archive_name); if( create_pointer = fopen(archive_name, "r") != NULL) { printf("file already exists\n"); continue; } else { …

explain about a string?

Can anybody temme how to run a pop up window TSR program written in C ..... m unable to create .obj file of .c file.... TC showing ERROR like " TASM.exe not found" and "Linker error".......

i know that the prototype of putchar() is: int putchar(int ch); eventhough its return type is int why does it print ch in character format instead of printing it as its ascii equivalent?

Where can we get fine material about OpenCL.....suggest any sites or links..

i want to know how to check if the file already exists before creating the file? [CODE] puts("please enter a file name to create:\n"); scanf("%s", &file_name); create_pointer = fopen( file_name, "ab"); if( create_pointer == NULL) //create file// else { //file already exist// how would you check if the file already …

I have heard there is a C++ split function, but I have not yet found anything to help me work with what I have. I have the following: [CODE]001E3897 1024 HV regread set [rootPos: 0001CBE7, offset 1862832 ][/CODE] I need to be able to take this and split it into …

Hello Is it possible to somehow place another string inside a string ? Example: char array1[4]= "!!!" char array2[5]="joey" //Replace e with array1 Output : jo!!!ey Thank you for any kind of input

what is an array?

what is stack?

I need an intersection program for my robot;if there is an intersection of roads,the robot should not stop or take a turn,it should follow the straight path rather than turning left or right or just stop. Please help me,its very urgent............

i am using avr atmega8 microcontroller....i am getting no idea how to read the value of a pin,I have used a IR sensor in that pin.

Hi. I'm hoping someone here is familiar with x86 optimization, because I'm stumped. I wrote two programs that find prime numbers in the same way, [URL="http://endlessbeta.org/code/prime.asm"]one in assembly[/URL] and [URL="http://endlessbeta.org/code/prime.c"]one in C[/URL]. It seems that no matter what I do to the assembly version, the C version is always faster …

I am struck with some floating-point precision. Please help me to get through this. [CODE]main() { int fact,i=5,div=8; float dec=0.427,temp,sum=0; while(i) { temp=dec*10; printf("%f\t",temp); fact=(int)temp; sum=sum+(fact/(float)div); printf("%f\n",sum); dec=temp-fact; div=div*8; i--; } printf("\n The Decimal part= %f",sum); getch(); } [/CODE] [ICODE]Output 4.270000 0.500000 2.700000 0.531250 6.999998 0.542969 9.999981 0.545166 9.999809 0.545441 …

Hi, I would like to using POSIX API system calls in C, and via command line arguments know how to go about extracting from an archive file.(in Linux). I have done the archiving process it archives the files I enter into the command line , and the last but one …

[CODE]#include <iostream> #include<cstdlib> #include<iomanip> using namespace std; int* userInput(int mat); void multiply(int mat, int* array); void print(int **mult, int **divides, int mat, int row, int col); //Main method, calls IO and handles the case for only 1 matrix. int main() { int mat = 0,i,j; int arrayA[mat][mat]; cout << "Enter …

I'v written the program below, but I'v been told its too "intense" Any ideas on how I can get the same results but with a simpler program? [CODE]#define MAX_SIZE 10000 char buf[MAX_SIZE], name[1000]; int min(int a, int b) { return a<b?a:b; } int main(int argc, char** argv) { FILE *out, …

Hi there)) I cann't deal with the file opening operation - [CODE]char* fpath = "D:\TC\myprog\readit.txt"; FILE* fp; fp = fopen (fpath, "r"); if (fp != NULL) printf ("\n(!) File opennig error\n"); else printf ("\n(+) File have been opened successfully!\n"); for( i=0;i<=n-1;i++) { a = getc(fp); putchar(a-48); putchar('\n'); }[/CODE] For some …

hi everyone)) Please tell me - where is the mistake here - [CODE]struct address {char* city ; char* street; int housenumb ;}; struct addinf {int age; struct address* address;}; struct student {int number; int kurs; char* name ; struct addinf* addinf;} stud; stud.number=1; stud.addinf.address.housenumb =123;[/CODE] thanks in advance)

is it possible to copy specificity from a file for example i want to copy x number of bytes from x position to x position?

this code doesnt work, as in it only asks the user for getchar once and putchar once. i tried putting it in two method and it didnt work either. also whether it be char or int it is the same. that leads me to another question. why is it allowed …

Hi guys! please tell me - how to determine the length of the input stream without reading simbols ? (for save the input string) thanks in advance ))

Hi guys! )) please reply - how to clear the input stream of the console? thanks in advance ))

I've been having some problems trying to extract the GET variables from URL. This is what the url looks like: www dot example dot com/live/t00/250lo.gif?tr7zt8&uid=4ccc6cd4fc7cc630&CXNID=2000001.5215456080540439072NXC&pub=telegraphmedia&rev=86981&si=4d28ac59f9a3d32e&lc=MDAwMDBFVUdCRU4yMzE4MTgwNDAwMDAwMDBDVg%3D%3D&ln=en&pc=tbx&uf=0&pi=1&dp=www.telegraph.co.uk&fp=news%2Fuknews%2F8248083%2FFather-drowns-while-trying-to-rescue-dogs.html it's a bit long, but basically each variable is separated by an ampersand, so we have, for example: uid=4ccc6cd4fc7cc630&CXNID=2000001.5215456080540439072NXC&pub=telegraphmedia&rev=86981 which translates into: uid=4ccc6cd4fc7cc630 CXNID=2000001.5215456080540439072NXC pub=telegraphmedia …

I am a fresher in C and working in Linux.I created two small programs that can interact with each other. That means both can send strings to other one with in two terminal. I want to interact from two system like IP messenger. How can I make this. Socket? Pls …

Hi! This is a real simple and stupid exercise I thought I knew how to handle. The complete heading is: - Write a function in C whose input is a real number and whose output is the absolute value of the input number. The following is the code I've developed. …

Hi guyz! [B]My name is Faisal Rashid.I am student BCS.Kindly I need your help.Please give solution of following problem as quick as possible.I need this urgent. Thank You I need a solution of Puzzle of from a book "Let Us C by Yashwant kanetkar" and question is from Chapter 8 …

hello everyone... m writin a code that will take data frm stdin from user which can b of indefinte size.. but i cant make use of static arrays....and even calloc and malloc is not working properly...what sud i do??? thanks for help...

hey everybody can anyone helps me, please? i must program a projekt but i don´t know how i do it. the projekt: Write a program to convert from 12-hour time format to 24-hour time format. The 12- hour format has the form hours:minutes followed by either A, P, AM, or …