[c] Forum Topics

Hi everyone. I'm tying to understand the instruction below. I wish someone could explain me what it means: tree->destroy(((AvlNode*)(*position)->data)->data); // destroy the left branch of the binary search tree starting from the specified node static void destroy_left(BisTree* tree, BiTreeNode* node) { BiTreeNode **position; // can't remove from an empty tree …

I have Dev-C++ as an IDE and MinGW as the compiler, and I am running C programs on the IDE. I have this project where I have to write raw PCM data (unsigned 8-bit i.e bytes of PCM) as an array. I have figured out the reading part but when …

Hi, Can somebody write a sample code to reverse a string using recursion. Basically a function which takes string as input parameter, reverses the string using recusrion and returns back the reversed string to calling function. Thank you Naveen

I cant figure why my program is not running it compiles with no errors but doesnt run, am bearly starting to learn c , am more proefficient in java but its wierd changing, i use vi to write my code. heres a snipet #include <stdio.h> #include <stdlib.h> #include <time.h> #include …

How to store the elements and display?? struct A{ int level; char name[20]; struct b *a_b; }*d[3]; struct b { char name[20]; struct b *next; };

Recently, I saw somebody start a "Deal or No Deal" game in the Posting Games section. This got me thinking of writing a program to actually play the game based on the rules of the show. So I spent a couple of hours writing this in ANSI-C. I probably should …

I recently wrote a program to determine my current working directory using getcwd(). getcwd() returns the starting address of the character array supplied by the programmer. I have written a very simple program and as I am not an experienced C program can anyone mention what I can do to …

Basically I'm supposed to make a program that copies the Unix -wc command. Flags -l, -w, -c, and -L are supposed to display # of lines, # of words, # of characters, and # of characters in line, respectively. I am having trouble reading in a text file (first time …

hai , I am using turbo c compiler, the system() function always return -1. i can't run any dos command using system() function i can't use system() properly please help me !!! ex: [CODE] #include<stdio.h> #include<conio.h> #include<stdlib.h> void main() { int i ; i=system("dir"); printf("%d",i); getch(); } [/CODE]

Hello, I am posting from a prompt for joining Daniweb. I am very much ignorant to the world of programming, but I aim to reverse that as best as I can. I am taking Introduction to Programming in C at my school, and I am taking the course for Python …

this is an exam question i failed to answer properly, im trying to work it out. the code i came up with is below, it works ok, but i was hoping if anyone could help in improving it. iv read in various threads in daniweb itself about making a code …

I'm working on a horse race. So in my program, a random number is produced. This random number can be 1 through 100. If the random number is 1-35, then horse one will be the winner. If the random number is 36-47, then horse two will be the winner. It …

I was wondering how the compiler searches for a file using just the name of the particular file. The function argument that should be supplied is the file name in double quotes and mode i.e. read, write etc. What if there are two files of the same name but in …

Hello This my first programming class and I noticed that someone posted the following Simply Array Process Pseudocode which is in regard to: Input a list of employee names and salaries, and determine the mean (average) salary as well as the number of salaries above and below the mean. My …

So, I have to allow a user to enter numbers into an array. I then have to store that array in a text file and a binary file. How would I go about doing this? I have the array part of it down, it's just storing the array into the …

im keep getting ror: expected identifier or '(' before '.' token|error: expected expression before what am i doing wrong? #include <stdio.h> #include <conio.h> #include <stdint.h> int main() { typedef struct { char name[20]; char year[20]; int inout[20]; }movie_rent; movie_rent[20]; int i,sum=0; FILE *myfile; if ((myfile = fopen("mov.txt", "rt")) == NULL) …

this code gives the correct result upto size 6 (i'v run this a few times, and 6 seems to be the boundary), although the intermediate steps are all insane! then onwards, from size 7, it returns minimum value 0 /*minimum of an array using recursion*/ #include<stdio.h> #include<stdlib.h> int findMin(int* arr,int …

I am trying to copy the column, from bottom to top element,to the row , but it does not work. Plase help #include <stdio.h> int main () { int Image1[3][3]={{1,2,3},{4,5,6},{7,8,9}}; int Image2[3][3]; int i= 3; int j =3; int k =0 ; int l; while ( k <= 0){ i=0; …

Where can i download the various header files for dev c? sys/types.h sys/socket.h netinet/in.h arpa/inet.h and also structure sockadder and it's derivatives

Hi guys, So i wrote a little code, not fancy, to convert a signed decimal to its binary representation using two complements. char immeStr[17]; int main(){ int neg = 0; int i = 0; int bit = 6; char binaryNum[bit+1]; int z1[bit+1]; int temp = -30; int k; int cout …

#include <stdio.h> int main(void) { int ten = 10; int two = 2; printf("Doing it right: "); printf("%d minus %d is %d\n", ten, 2, ten - two ); printf("Doing it wrong: "); printf("%d minus %d is %d\n", ten ); // forgot 2 arguments return 0; } hello actually i coulnt …

suppose the input is 1,2,3,5-14,16-20,-25,31- :the program must print output: 1 2 3 5 6 7 8 9 10 11 12 13 14 16 17 18 19 20 0 1 2 3 ...........25 31 32 33..... til end of file I WAS REJECTED FROM MY LAST ROUND OF INTERVIEW BECAUSE …

I am trying to get my program to run when I input two integer numbers in the subroutine, and then do the following math (x+y)/5. Dont know where I am going wrong. #include<iostream> using namespace std; int Divide(int X,int Y); int main() { int X; int Y; cout<<"first number:"; cin>>X; …

I am having problems with pointers and i am getting two errors saying "invalid argument type of 'unary *'" float getProfit(float* bushels, float price) { int i = 0; for(i = 0; i < 20; i++); { *bushels[i] = *(bushels[i]*price); } return 0; } any ideas on a solution? i …

i want to print a 'double' variable upto 8 decimal places without trailing zeroes. for eg: if a= **10.1234** then print **10.1234** if a= **10.00** then print **10** if a= **10.11111111111** then print **10.11111111** (max of 8 decimal places). how to do it? i searched for it and found this: …

I understood that when you pass the name of the array as an argument to a function we are actually passing the base address of the array, which inturn gets collected by a pointer variable and thus s[i]=*(s+i)=*(i+s)=i[s]. The problem begins when we turn to 2-D arrays. When we want …

My questions are how to find the nth prime number? I have figured out how to find a list prime numbers. I'm just stuck as for being able to change my code to only print out the, say, 15th, or 500th prime not every previous prime as well. Any help/feed …

Hi. Nice to meet you. I'd like to know if I'm doing the allocation of memory from data to new_data correctly and why new_data only has one value since the memory of data was copied before to new_data. set size: 10 set[000] = 000 set[001] = 001 set[002] = 002 …

is `char** val` the same as `char* val[ ]` when is the formal ( `char** val`) used

**Write a C program for an automatic teller machine that dispenses money. The user should enter the amount desired (a multiple of 1000 naria) and the machine dispenses this amount using the least number of bills. The bills dispensed are 1000s, and 500s. Write a function that determines how many …

Hi guys. I would like to ask several questions about this. Im on my final phase of the proj, will appreciate some information. Qn 1: How do i make the user continually input till he types 'exit' to exit? Qn 2: If he types wrongly, or database couldnt find the …

To Check the Given Triangle is Isocles , Equilateral or Right Angled Triang

int x = 0; int i,j,p; int buf[4]; int *array[5] = {0}; for (j = 0; j < 3; j++){ for (i = 0; i <4; i++) { buf[i] = x++; } array[j] = buf; } int* temp; temp = array[1]; for (i = 0; i<4; i++) { printf("%d\n", *temp); …

How to accept strings and print then them please explain me with example if possible Thanks in advance .............

I have started learning to program by visiting Codecademy for Python and taking an intro to programming class using C. I am keeping up with both, and although I have only written simple programs, it still excites me to run the code and see it output the day I designed …

Hi all, I am planning to design mibile app using c,c++ if possible.can any one please suggest me how to design it if possible. Please your thoughts regarding this and appreciate your suggestions. Thanks, Va.

hellow im am studen of the 4th sem information technology i wann a made a project in c turbo.how can i made

I am trying to use the ncurses menu library to create a menu. I found some wonderful sample code online and it displays great on my screen, however I can't figure out how to select an option and have it go to a new menu or have it select a …

hello, I am working on a project that involves a bit of directory manipulation. Until now i only had to create create directories as per user input, so till now the commnad mkdir worked fine: mkdir("c:/test"); But now i have to do some manipulations on the string to get the …

Is it possible to convert a postfix expression to prefix expression using only recursion? If possible what's the algorithm?

Hi, I have given a task to write a code about approximate of pi. this is what I wrote from the other example. the task is to : (pi^2)/16 = ((-1)^k)/k+1 (1+1/3+1/5+...+1/(2k+1)) Write a program which computes and prints an approximation of pi using a finite number of terms from …

I am writing a program that calls the memory address of different variable types. I am having troubles with getting the address locations for my array and my char pointers. Here is what I have so far: #include <iostream> #include <string> using namespace std; int main() { const int NUMBER_LIST …

i have put one FUNCTION (Display) in the code's but still not functional is there any way by which we can convert BCD to DEC code's and can be printed out as output I know its wrong please help me to make it right thanks [ the CODE's is for …

This code is crashing, please tell me for what all I need to assign memory. Thanks #include<stdio.h> #include<conio.h> #include<stdlib.h> struct s1 { char *p1; }; struct s2 { struct s1 *p2; }; struct s3 { struct s2 *p3; }*p4=NULL; int main() { char a='a'; p4=malloc(sizeof(struct s3)); p4->p3->p2->p1=&a; printf("%c",*(p4->p3->p2->p1)); return 0; …

Hi, can you help me please? how to make a program where you can enter the usrnme, then enter the paswrd, but the paswrd will be written in asterisk and only read afer pressing ENTER; if usrnme is correct and pass is correct, it will say "welcome" if usrnme is …

I want to write a program in C that will take a .wav file as an input and will output a C array i.e. raw PCM samples. I know the bitrate and have other information about the .wav file beforehand and I just want the PCM samples. The PCM samples …

Firstly, i'm really new to all this bash/unix/c stuff so i will probably get some words meanings wrong here, but anyway: Im trying to make a client pass simple shell commands to the server, which executes them. They communicate locally on the same machine through a socket. I can make …

**Algorithm** step1: display 3 choices step2: user inputs one choice step3: Choice is store in one variable step4: selected choice is transfered to switch function step5: choice is compare to cases step6: a text document is created stating you choice. **This is layout of the code:** #include<stdio.h> void main() { …

Hey guys i have a small problem i would love some advice..this code outputs a hollowed box the problem is i cant get the right most column of the box in the right postion without tabbing it across..which will create problems if i want the user to determine how big …

#include<conio.h> #include<stdio.h> #include<string.h> int mistakes_ctr=0; int x=52, y=22, i; void printM(){ gotoxy(20,20); cprintf("m"); } void printP(){ gotoxy(22,20); cprintf("p"); } void printL(){ gotoxy(24,20); cprintf("l"); gotoxy(34,20); cprintf("l"); } void printA(){ gotoxy(26,20); cprintf("a"); } void printN(){ gotoxy(28,20); cprintf("n"); } void printT(){ gotoxy(30,20); cprintf("t"); } void printO(){ gotoxy(32,20); cprintf("o"); gotoxy(36,20); cprintf("o"); } void printG(){ …