[c] Forum Topics

I borrowed this from C#, where you can easily send output, that normally goes to the ugly black console window, to a nice looking Windows MessageBox with an OK button to close after you read your results. You can accumulate your output in a string to send to one message …

so the code is pretty simple. it just loops and if statements. first i have a main. i took the headers and prototypes out to make it smaller. In main all iam doing is asking user to enter command and call one funtion. // main.c int main(int argc, char *argv[]) …

Hi i had never before used structures, so i am a complete noob ;) . this is a small Part of my programm: struct player { int var1; int var2; int var3; int var4[10]; int var5; int var6; }; struct player p[4]= {{1000,0,0,{0,0,0,0,0,0,0,0,0,0},0,1}, {1000,0,0,{0,0,0,0,0,0,0,0,0,0},0,1}, {1000,0,0,{0,0,0,0,0,0,0,0,0,0},0,1}, {1000,0,0,{0,0,0,0,0,0,0,0,0,0},0,1}}; printf("%d\n"), p[0].var1; printf("%d\n"), p[0].var2; …

Hi guys. so I have been trying to solve this problem and I wrote a program but it doesn't work for some reason I would apreciate a help from you guys. The problem: A palindrome is a word, phrase, or any other sequence of letters that can be spelled the …

I am reviewing material i have covered in c and i wrote up some notes and i am getting an error, i was hoping if someone could help me with this #include <stdio.h> #include <stdlib.h> #include <string.h> struct node{ int data; struct node *next; }; void addtobegining(int); void traverse(); struct …

Hi, I am facing some problem dealing with the qsort funtion. Basically, the below program takes in a bunch of strings from the text file "word.txt" and then implements the qsort function for sorting the list alphabatically and then displaying the sorted list. However, after the sorting is done, all …

I've been going through major hell trying to get just one. damn. simple. little. game. working. I can't even complete ping pong! There's almost no game easier than ping pong, and I can't even do it after so much stress trying, and I'm becoming so frustrated over this that I …

OK, so here's the deal. I'm trying to create 2 programs, a server and a client, which communicates between them. I'm working on Ubuntu, throughout FIFO. So, 1st of all, I create 2 FIFO's: $ mkfifo pipe $ mkfifo pipo Ok, and after that I create the client and the …

I have to write a program that does BFS traversal. My code is mostly correct but i have an error somewhere. it prints repeated numbers in some cases and it's not supposed to. i'm not sure exactly what the problem is. I really hope someone will be able to help …

Hi all!! See the following code: #include <stdio.h> int main() { union a { int i; char ch[2]; }; union a u; u.ch[0]=1; u.ch[1]=0; printf("%d %d %d\n",u.ch[0],u.ch[1],u.i); getch(); return 0; } The output that I get is: 1 0 2130509825 Why am I getting this number? What I think the …

#include<stdio.h> #include<stdlib.h> struct student{ char *name; int number; }; struct class{ char *name; struct student *st_array; // pointer of array of students int size; // All students free places int current_size; // Occupied places }; struct student make_student(char name[100], int number){ struct student st; st.name = name; st.number = number; …

Hi, I have a large array of values and would like to find a way to calculate the change in value for each period. I have been attempting to use a for command with an array to do this, but I have not been successful at all. The basic idea …

Hello i was assigned for a task to find the Name and books Taken as a count from the given TWO array table , I wrote a program but it's not working , experts pls help me out!! commondata b/w the TWO ARRAY TABLES are - ID of a student …

Hi all! I was experimenting a little with scanf. I am posting the code and the outputs I am having prolems understanding: #include <stdio.h> int main() { char a,b,c; int d,e; scanf("%c%c",&a,&b);//-------------------(1) printf("%c %c\n\n",a,b); scanf("%d%d",&d,&e);//-------------------(2) printf("%d %d\n\n",d,e); scanf("%c abc",&a);//--------------------(3) printf("%c\n\n",a); scanf("%c abcdefgh",&a);//---------------(4) printf("%c\n\n",a); getch(); return 0; } In (1): Doesnt …

Is the first texture name returned from glGenTextures always guaranteed to be 1 for the first call in your program?

#include <stdio.h> #include <stdlib.h> int main() { begin(); } int begin() { long int b,res1,res2,res3; int a,c,d,e,f,i; printf("Enter first number: "); scanf("%d",&a); printf("Enter second number: "); scanf("%ld",&b); c=b%10; d=b%100-c; e=b/100; res1=a*c; res2=a*d; res3=a*e; f=a*b; printf("\n\n\n"); printf(" %d\n",a); printf("x\n"); printf(" %d\n",b); printf("________\n"); printf(" %ld\n",res1); printf("+ %ld\n",res2); printf(" %ld\n",res3); printf("_______\n"); printf("%d\n",f); system("PAUSE"); …

Please Tell me how to scan a source file in c..suppose a file i am giving as input and i have to scan that files for different things...can anybody help me!!!!!

warning: int format, pointer arg (arg 2) i have no pointers this function :( main.. functions.... functions. int test(char num) { int total[SIZE]; printf("%d",total); fflush(stdout); //no pointers return 0; }

hi i am using fedora 14 and 16....while executing the parallel programs in c i am getting segmentation fault(core dumped) when i give the array size more than 100000 ....

Hi, my project works with emulating the file system. I can invent my own as well. I'm developing a unix like shell which will provide all the file handling commands similar to unix. Basically I want to allocate a large file on the actual file system, and treat it as …

i have problem that the the loop to check if a digit is correct but not at the right place. then print. void feedback( char random[4], char guess[5]) { int i; for(i=0; i<4; i++) { if(guess[i]==random[i]) { printf("#"); } } if((guess[0]==random[1]||guess[0]==random[2]||guess[0]==random[3])&&guess[0]!=random[0]) { printf("*"); } if((guess[1]==random[0]||guess[1]==random[2]||guess[1]==random[3])&&guess[1]!=random[1]) { printf("*"); } if((guess[2]==random[0]||guess[2]==random[1]||guess[2]==random[3])&&guess[2]!=random[2]) { …

Hi guys I need help on how to create a remake of the popular tetris game for my csharp project. I am wondering how I will be able to design the tetris blocks on my own, I mean can I do it in xna? I tried once to use xna …

Hi all, I have written a program to find the reciprocal of an input number by using newton rhapson iterative method. Below is the algorithm implementation in C: #include<stdio.h> #include<stdlib.h> #include<math.h> int main() { double guess,newguess,input,error=1.0; printf("Enter the input number"); scanf("%f",&input); printf("Enter the guess for the reciprocal of the input …

Hi, I created a C program which basically calculates bunch of variable values.... Although the desired output for the final version program is just a few lines, however, for debugging purpose, I've printed the variable values everytime a change is being made in-code. As a result, the output consist of …

i need help with if statement. for some reason its not working right and i dont know why. i never goesinside 2nd if statement. i i want to go inside this if statement - if left_var value is "2x" //for loop iam start with x. b = 'x' and b-1 …

Hi, i want to read each of the 4 columns stored in a .txt file separated by a space into an array of their own. The text file may have hundreds of rows so reading until the end of file is desirable. Example: 3.4407280e+003 6.0117545e+003 8.0132664e+002 2.5292922e+003 3.4163843e+003 5.9879421e+003 7.7792044e+002 …

Hi there, As the title says, I'm having an issue passing an array of structures to a function.The structure reads and tokenises information from a text file. I then need to do things with that data using several different functions. Here's my code: #include <stdio.h> #include <stdlib.h> #include <string.h> typedef …

Dear All, I have written a program to find the smallest divisor of an input number. The code gives me an error in lines 19 and 23. The error is invalid operands to binary %. Please help me to troubleshoot, thank you. Below is my code: #include<stdio.h> #include<stdlib.h> #include<math.h> int …

lets say i have a i have a char array char left_var[] //-33x-4x+x this char left_var array has the value of "-33x- 4x+ x" and result should be "-33-4+1" and store in another array called in another word iam trying to get rid of x's and if there is only …

Dear All, I have written a program that finds the integer whose square is closest to but greater than the integer number input as data. But it is giving me an erroneous answer. My algorithm is: 1. Select a number which is half the input number. 2. Square it and …

Well, it's been a lonngg time since I've last been on DaniWeb and everything looks different. Anyway, I'm having a bit of a brain fart I suppose so I'm hoping someone can help me out. I've been working on this program that basically reads in a fasta file with multiple …

Hi, Is this a valid while loop? : while((grid[tr][tc]=='0'||grid[tr][tc]==s[i]) && tr<row && count<strlen(s)) { ++count; ++tr; } Although the full program compiles fine, but *sometimes* my program crashes during runtime giving me a "Access violation(Segmentation Fault)" error and the debugger points to this loop statement... By the way, I'm using …

I was reading a book and it said "Mac names cannot be overloaded and the macro preprossor cannot handle recursive calls: #define PRINT (a,b)cout<<(a)<<(b) #define PRINT (a,b,c) cout<<(a)<<(b)<<(c) /*trouble?:redefines,does not overload*/ Can someone pls explain possibliy with examples?

I have a case study to display voltage wave forms on the PC monitor using Turbo C by use of an ADC card. The case study is as follows: PC Oscilloscope The main aim of this case study is to capture analogue signals using the ADC card in the PC …

Given two integers A & B. Determine how many bits required to convert A to B. Write a function int BitSwapReqd(int A, int B); Please first define the logic to calculate the number of bits required to convert A to B and then code. Thankx a lot.

Hello All, I am new to C programming. I was trying to write a code that will allow me to take an array of n elements, and take every combination of pairs and write it. example: array: 1, 2, 3, 4, 5 output: (1,2), (1,3),(1,4),(1,5),(2,3),(2,4),(2,5),(3,4),(3,5),(4,5) I would truly appreciate the …

Hey guys, I'm new here. a little bit about me: Nimrod, 15 years old from Tel Aviv (Israel). I've been web developer for 3 years, I had 3 big web sites. (One of them still on the net). Currently, I'm focusing on application programming. I know as good Php, Java …

how to remove zeros from int array? for ex if i have a array 1,2,0,34 than result is 1,2,34. i was thinking may be use trim function? another idea was to put space. for ex 1,0,2,0,3 than reslust is 1, ,2, ,3 note iam trying to do this without making …

I've attempted to create a linker for assembly files, what the program does is not the issue here though, I havent used pointer arithmetic in a few years and am definitely rusty in doing so. I'm getting a segmentation fault when I attempt to run the file and would like …

Im suppose to have this prompt me via stderr to enter two 32-bit keys. I use fgets tofrom stdin to read up the line the user inputs. Then im suppose to parse the line into tokens using strtok_r that converts them to unsigned longs. I already have a function strToULong.c …

it gets compiled but it crushes: "programm has stopped working" Please help me!!! this is the programm: #include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]) { FILE *fp; int i=0, n; char allwords[100][40]; fp=fopen("fraoules.txt","r"); if ( (fp=fopen("fraoules.txt","r") )==NULL ){ printf("To arxeio den mporese na anoixtei\n"); } while(strcmp( allwords[i],"telos")!=0){ fscanf(fp, …

trying to create fifo that can read and write. but some reason its not going below "O_RDONLY" line. any thoughts? char *fifo_name = "fifo"; #define 0666 int main() { int fd1; int fd2; //create fifo if(mkfifo(fifo_name,FIFO_MODE) == -1) { exit(1); } //open fifo for read if((fd1 = open(fifo_name, O_RDONLY)) == …

hi i try to build a project in c by using code::blocks but i get this result: vector_matrix multiplication - Debug" uses an invalid compiler. Probably the toolchain path within the compiler options is not setup correctly?! Skipping... Nothing to be done.

#include <stdio.h> #include <stdlib.h> #include <string.h> int main() { FILE *file; char ch, str[500], a=0; char name[20], word[50], temp[50]; int i,lenght=0, b=0; if((file=fopen("sample.txt" , "r"))==NULL) { printf("Error while opening file\n"); system("pause"); exit(1); } while (!feof(file)) { fgets(str, 499, file); printf("%s\n",str); ch=fgetc(file); if(ch!=' ') { a++; word[b]=ch; if(a > lenght) lenght=a;f …

Hi everyone, I'm trying to parallelise a Gram-Schmidt algorithm. Here's the serial code: for( k = 0; k < m; k++ ) { for( i = 0; i < k; i++ ) { s = 0.0; for( j = 0; j < n; j++ ) { s += q[ i …

I want to push a value to a stack using the assignment operator, I need some help with this.. Thanks Stack s; float x = 5; s = x; class Stack { public: Stack(); float push(float value); float pop(); int Size(); float operator = (const float &right); private: float values[30]; …

what does fork() do in c.? Is it same as fork operation in OS ? What is the o/p of following program ? #include<stdio.h> main() { int i=0; fork(); printf("%d",i++); fork(); printf("%d",i++); fork(); wait(); }

Need help from daniweb community. I suck at programming. It doesn't make sense to me. I'm not going to be programming in my career but it's part of my major. I'm desperately trying to get an c- just to pass. Would love some help. I would appreciate some explanation but …

I'm trying to use the system call to append an arbitrary number of files to one specific file... when I attempt to run the program i get the error: sh: addints.o: not found sh: main.o: not found sh: rbyswt.o: not found sh: readint.o: not found sh: writeint.o: not found sh: …

Hi all, can someone please help me with my code: Its suppose to input a text file of values then display them and give the max and its index, and inputed values are floats. But I can seem to get the max right. Thanks #include <stdio.h> int main() { FILE …