15,551 Topics
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| | I have made a line follower robot. now i want add an another property to that robot. my line follower followes a black line. i have used ir sensor and atmega 8 microcontroller. i have done it with embedded c. it worked properly. now i have made 4 white marks … |
| | Does anyone know how to read the contents of a binary file into a static struct array, that can then be searched like a normal array? |
| | hello my question would be if som1 can help out with a better prototype than i have for verifying if input is within ascii alphabetic range what i have now [CODE]int betu (char s[]){ int i, jo=0; for(i=0;i<strlen(s);++i) { if(!isalpha (s[i]) && s[i]!=' ' ) return 0; else ++jo; } …  |
| | I have been working with a atmega8 micro controller. I am a beginer in embedded c. I have already wrote programs like line follower, obstacle avoider etc. and they all worked properly. So, now i want to drive a servo motor with my ATMEGA8. for that PWM should be generated, … |
| | [code] #include <stdio.h> #include<stdlib.h> int **matrix_mul(int **m1,int **m,int a,int b,int c,int d); main() { int i,j,r1,r2,c1,c2,**p,**q; printf("Enter the number of rows and columns of first matrix :\t"); scanf("%d%d",&r1,&c1); printf("Enter the number of rows and columns of second matrix :\t"); scanf("%d%d",&r2,&c2); //memory allocation for m1 int **m1; m1 = malloc(r1 * … |
| | im trying my hand at reading data via serial communications on a windows 32bit computer. ive accomplished this, extremely crudely and have to some degree been successful. the device i am trying to read sends data in the format $A.B.C$ followed by a '\n' or newline. using the code written … |
| | I'm running ubuntu on x86_32...and I keep getting segmentation fault while running this program. [CODE] #include<stdio.h> #include<stddef.h> char *memcp(char *dest, const char *src, size_t n) { char *dp = dest; const char *sp = src; while(n--) *dp++ = *sp++; return dest; } int main() { char *s = "abcde"; char …  |
| | Hello So I have a simple structure : [CODE] struct students { char name[30]; unsigned int noofcourses; char course[50]; char status[30]; }arr[50]; //50 students [/CODE] I would like to know is how could I read multiple courses in per student from memory.[CODE]Example: Joey Brown 4 Math$Chem$Phy$Cooking Enrolled m8!! [/CODE] So … |
| | I'm writing a simulation in population genetics and am having a problem setting up the initial population. The problem boils down to this... [CODE]int test[1][1][1]; test[0][0][1]=1; test[1][0][0]=2; printf("test: %d\n",test[0][0][1]);[/CODE] Why does this print 2? I feel like it should print 1. I've searched forums for an answer, but haven't been … |
| | Basically, I need to program something using STACK, backtracking to make all the possible sum, of "n" numbers. Example. If a user input 5. n = 5 1: 1 1 1 1 1 2: 1 1 1 2 3: 1 1 3 4: 1 2 2 5: 1 4 6: … |
| | pretty much here is a rough outline of what i have done [CODE]struct monster { int health; int armor; monster *nextaddr; }; int main() { int num; monster *pointer; printf("how many monsters do u want"); sscanf(%d, &num); pointer = (monster*)malloc(num * sizeof(monster)); //Here i need some kind of LOOP to …  |
| | 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 … |
| | 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 … |
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| | 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, …  |
| | 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 …  |
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