19,876 Topics
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| | Hi, I am new to programming.. and am studying IT at Uni Over the weekend, I managed to write a java class that handles errors and loops until receiving valid input for a range of different datatypes. I am looking to write something like this in C (as my other … |
| | [code=c]#include<stdio.h> #include<stdlib.h> #include<conio.h> #include<string.h> void main() { FILE *fp,*ft; char another,choice; struct emp; { char name[40]; int age; float bs; }; struct emp e; char empname[40]; long int recsize; fp=fopen("EMP.DAT","rb+"); if(fp==NULL) { fp=fopen("EMP.DAT","wb+"); if(fp==NULL) { puts("cannot open file"); exit(1); } } recsize=sizeof(&e); while(1) { clrscr(); gotoxy(30,10); printf("1.Add records"); gotoxy(30,12); printf("2.List … |
| | Hi i wrote a program which get query from mysql and store in varible in C.but it can't convert Object mysql ro int.any idea?? [CODE]#include <stdio.h> #include <string.h> #include <mysql.h> #include <stdlib.h> int main(){ char *email, name[30], domain[30], query[100], tmp[200]; int i=0,j,k; unsigned int size; email = "test@example.com"; char ch; … |
| | Hi I'm trying to write a simple version of the tail program in linux, but I keep getting a seg fault when I run the program. I wrote a simpler version but with fixed number of lines to print and using [code] char lines[10][100]; [/code] instead of [code] char **lines; … |
| | My project is all about queue implementation... please write me a code about calculator with queue. tnx. |
| | I have this piece of code wherein I want p to point to array index with value 10 struct_a { int value; ... } There is an array of struct_a. finditem looks through the array to find one with value = 10; main() { struct_a *p; fixup_p(p, 10); } void …  |
| | I'm a student trying to teach myself C. I know the basics of it and now I would like to write a simple DLL using the WinAPI so I can use it in another BASIC-like language. I'm using CodeBlocks with the compiler it comes with (since I can't afford to … |
| | Hi guys, I am currently doing my assignment. It requires me to create a program that will be able to create an address book using File.So far, I managed to display all the contacts, search the contacts and delete the contacts. But , I m not able to sort the … |
| | Thanks in advance for any one who helps me. Code is in C using unix system calls. I am writing a code that forks a process and that forked process gets worked on by a function, in my case its called processone. I had a similar program, in which i …  |
| | [code]include<stdio.h> #include<conio.h> void main() { char u,pp; printf("\n\n\t\t enter the username and password"); scanf("%c%c",&u,&pp); getch(); }[/code] what was wrong in this code, Its taking the username but its not properly taking the input of password. And my another doubt is how can i use string for this program instead of … |
| | Hi,Can anyone help in FEC coding in C++,I tried a lot but m not getting the logic. Atleast anyone can suggest me the logic. Thanks |
| | I have a file like this: [CODE] 2 | H| 2 | H| 2 | H| 2 | H| 2 | H| 2 | H| [/CODE] & this code to read it in: [CODE] f = fopen(p, "r"); char *t[100]; int i = 0; int i2 = 0; int n …  |
| | Im having some trouble in forking. All i want to do is to create a child process and under the child process i need to create a grand child..here's my code #include<stdio.h> #include<stdlib.h> #include<unistd.h> int main(int argc, char *argcv[]) { int val; val =fork(); if(val==0){ printf("Child process running\n"); printf("Child:%d PID:%d\n",val,getpid()); … |
| | every thing works till the fopen, the sprintf works as i'm printing to check that. i just doing know what is causing this not to work it prints "cannot open (null)" but the filename var does have something assigned to it. any help will be welcomed [CODE="c"] char tmpfilename[10]; char … |
| | Here is my source code of inputting and print the matrix: [CODE=C]#include<stdio.h> int main(void) { unsigned int m,n; int a[10][10]; int i,j; int temp; printf("Plz enter the number of rows of Matrix:\n"); scanf("%d",&m); printf("Plz enter the number of columns of Matrix:\n"); scanf("%d",&n); printf("Enter elements for the Matrix:\n"); for(i=0; i<m ;i++) … |
| | I need to print to data stream to an output file but I'm not sure how to catch the data. Given example inputfile.txt has 20 data with a structure Michael 000000 m [email]abc@123.com[/email] 50 60 70 [code] #include <stdio.h> #include <string.h> void scanData(struct student data[]); void avgMaths(struct student data[]); void … |
| | Create a tic-tac-toe game. 1.First display a welcome message to the game. A player enters her or his name, selects to play first or not, and then start to plays the game. 2.Display a 3 by 3 tic-tac-toe board. 3. The player selects the cell to mark. The computer randomly …  |
| | hey there, good day, i have a problem regarding a csae study, im a newbie and i dont know what's the problem of my source code...help is badly needed,thanks |
| | I want to sub-function the reading and printing data. But it says data corrupted. Sorry for my poor english. Example of inputfile.txt [code] Michael 000000 m michael@abc.com 75 82 90 [/code] [code] #include <stdio.h> #include <string.h> void readData(); void printData(); struct student { char studName; int studID; char sex; char … |
| | I am working on a program to rewrite an assortment of integers in increasing order yet they are in decreasing order. I am pretty sure the problem is in my indexMax or sortArray functions but I cant find it. Can anyone help? [CODE]#include <stdio.h> #include "genlib.h" #include "simpio.h" #define size … |
| | I want to read an amount of string from the file Given inputfile.txt Micheal Tammy Alex [code] #include<stdio.h> #include<stdlib.h> int main(void) { FILE* input; char name[100]; char temp[100]; input = fopen("inputfile.txt", "r"); while((fscanf(input,"%c ", &name[i]))==1) { printf("%c ", name[i]); temp[i] = name[i]; i++; } } [/code] |
| | So my assignment is to go a little farther in this Mortgage calculator. by the way thank you for all the help thus far. I am trying to get this right, but can seem to get the math right. Here is the assignment: Write the program as a procedural C++ … |
| | hello! I need a program that validates the input of time. (in 24hr format) The user enters: hhmmss The problem is, I have trouble with complex programs. I came up with this program, but i know it's too basic for what she wants. I need to have arrays in there, … |
| | * Our focus here is on STRINGS since they are arrays of characters. * Write a program that reads a line of text (possibly a sentence therefore you can't use scanf() here), counts the number of words in it, and displays the words. * For our purposes, we define a … |
| | Hi all, I'm writing this piece of code out in unix. What I want to do is pass an integer argument through the command line and then manipulate it from there. I've done char strings before but cannot seem to get it to work with int's. Once I have this … |
| | i'm trying to parse a string of digits that can be 1 to 3 chars long, but how to do this is eluding me. would an isDigit method work? like this: [CODE="c"] if(isdigit(vararray[v])){ if(isdigit(vararray[v+1]) || vararray[v+1]==NULL){ if(isdigit(vararray[v+2]) || vararray[v+2]==NULL){ if(isdigit(vararray[v+3]) || vararray[v+3]==NULL){ return; } return; } return; } return; } … |
| | I have this code: [CODE] #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main(int argc, char *argv[]){ char *s = getenv ("HOME"); FILE *f; int optchar; char line[300]; char p[100]; strcpy(p, s); strcat(p, "/todo.txt"); while ((optchar = getopt(argc, argv, "r:a:ldc")) != -1){ switch (optchar){ case 'a': f = fopen(p, "a"); fprintf(f, … |
| | Hi, I have one address (0xffbff21c) where I have stored 2 int values, depending on the way I read it. Where is the second value stored (at which address)? My code is [code=c++]#include <iostream> using namespace std; int main() { const int a1 = 40; const int* b1 = &a1; … |
| | Hi Friends, I am facing a probelm. The moment I complete a program i C (version 3), it complies successfully. However, the moment I try to run the program it says a Linker error. I have tried to sort this out through Option-Linker, but in vain. I really need you … |
| | Please can anybody tell me the difference in return 0 and system ("pause"); |
| | [B]Hi all, I'm newB in C# and kind of lost now since couldn't find the right/suitable references. Please correct me if I'm wrong...[/B] My application will store values into database once user run it. In the Form Application, it runs well(no doubt). Now with the same approach, i want it … |
| | Hiya, I've got a lickle program here which reads data about people into structures and then saves their surnames in a Binary Search Tree. There is more stuff to go to that program, that is why I need structures, but at the moment [B]I can not understand why it doesn't … |
| | I have to hit <Enter> twice after inputting my dollar amount and store selection I think I am just missing something simple somewhere, but am going stupid looking for it. Went to the internet to try and find a good debugger, but have no idea how or where to even … |
| | Please can somebody help me to concatenate names in c. I try to enter names but anytime it will teat them as separate strings. this is what I tried to do : But i was getting segmentation faults, can you figure anyway out. |
| | Hi, I'm trying a few things in C, but cannot advance now. This program should read what it written in the shared memory if does not take any arguments. However if arguments are passed it should write what is passed into the memory. I can make it work if just … |
| | let say I got input.txt with following thing [QUOTE] Kelly // name of student 67 // Biology Score 89 // Chemistry score Michelle 75 45 John 78 90 [/QUOTE] and I use this fscanf command to scanf all the file until EOF: while ((fscanf (input, "%s %d %d", &studName, &bioScore, … |
 | Hi guys, I'm working in C in PuttY server.I'm looking for a program that can display an interactive menu that interacts with the user and also display a clock in the top right corner of the screen. So I need a program that can draw a border using C, and …  |
| | [code] #include<stdio.h> #include<stdlib.h> #include<conio.h> struct node { int info; struct node* llink; struct node* rlink; }; typedef struct node* NODE; NODE insert(NODE root,int data) { NODE temp,cur,prev; temp=(NODE)malloc(sizeof(struct node)); if(temp==NULL) printf("\nOut of memory"); temp->info=data; temp->rlink=temp->llink=NULL; if(root == NULL) { printf("\n1st time\n"); root=temp; return root; } prev=NULL; cur=root; while(cur != NULL) … |
| | Hello guys I have a problem with my code: I want to print an error message every time the user enters a number lower than -273.15 . My code runs well and does the desired mathematical operation. It even loops back to the input message, but I'm having huge headaches … |
| | Dear Pythoneers, I have been reading really good answers on this forum so I thought I'll give it a try and see whether someone can help me. What I want to do: "I want to embed Python in C++ and use Python's capabilities in order to create a expression evaluator" …  |
| | Hey, i need your help :(. Im working on a mail-downloader but it wont work (pop3) :(. mail provider:[url]www.gmx.net[/url] It always say "Wrong ID+PW" why? here is the code: [CODE=C++] #include "stdafx.h" // includes are there ;) //Prototypen int startWinsock(void); int main() { char buf[256]; long rc; SOCKET s; SOCKADDR_IN … |
| | Realized something today by accident. I am asking for a dollar amount in my program, and checking to make sure it is a valid amount above $0. What I am not checking for is a character response. I have tried some stuff, and nothing seems to work. Can anyone look … |
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| | I want to use to dimensional arrays to draw a graph. How do i go about it. I have never use it before. Please |
| | How to compute surface area of an object? Write a program that computes the surface area of an object. The user will choose a circle, rectangle or triangle. The program will prompt the user for the values needed (radius, 2 sides or base & height), then show the answer. Requirements: … |
| | So I was looking over someone elses code, and the main is unusual, no type. its just: #include <math.h> main(int argc, char *argv[]) I've come up with 2 theories: 1) It defaults to int? 2) #if/#endif directives somehow negate the need for int? Have no experience with this though, so … |
| | Hi , IM TRYING TO WRITE A TEXT FORMAT PROGRAM along the lines of the algorithm & pascal code found in similar named problem in "how to solve it by computer" R.G.Dromey. What it does is take a "limit" from user and users input text...it outputs the re-formatted text as … |
| | Hello, I was just trying to write some simple codes to learn C. I wrote 3 functions, create a list,print a list and free a list. but i get segfault while printing the list. (by the way, list is not a list datastructure. it's just an array) In create_list, I … |
| | Hi,:) I'm now doing a project on c# sql project.I have a database problem,:'( when a user gives the input dynamically through the front end ,the user data can be view through data grid view .but it is not getting stored in the original database.I have tried a lot to … |
 | # include <iostream> using namespace std; int main () { int arr[100], num, sum=0, size=0; cout<<"Enter an integer: "; cin>>num; if (num < 0) num*=-1; while (num != -999 && size < 100) { arr[size]=num; size++; cin>>num; for (int j=1; j<size; j++) { for (int i=0; i<size-1; i++) { if … |
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