51,593 Topics
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| | Hello everybody, This is parking program .I defined 4 task (keyboard,enter vehicle,exit vehicle,display) The program is compile but when I run it and press keys (E,S,F), it does not work. This program is written for linux. Can you help me? #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <stdlib.h> #include <pthread.h> …  |
 | Literally, I have been asked this question ""The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, … ; the first two terms are 0 and 1, and each term thereafter is the sum of the two preceding terms – i.e., Fib[n] = Fib[n – 1] + Fib[n … |
 | Everything was running fine, then I made a simple change. Like adding a class or two and bang!!! C2995. Can you spot where I have obviously gone blind and cannot see the error. I have header gaurds throughout the solution, so I dont understand why this is happening. Here are … |
 | I recently learn about the polymorphism and I don't know what is the purpose to use this feature. From http://www.cplusplus.com/doc/tutorial/polymorphism/ , it uses the child class rather than the parent class. I thought most of the time we inherit and we only use the parent class to access the child. … |
| | Hi, I do have doubt regading use of delete p . In most of the scenarios we call delete inside the destructor if we would have called something int *p = new int (10); but as per below code snippet (original code of delete p) it already invoke the destructor … |
| | Can anyone please explain to me how to compute DCT? I'm finding it hard to understand it.   I attached the formulas the Discrete Cosine Transform (DCT) and it's Inverse-DCT. |
 | Roots of quadratic equcation #include<iostream.h> #include<conio.h> #include<math.h> void main() { float a,b,c,disc,root1,root2; cout<<"enter a"<<endl; cin>>a; cout<<"enter b"<<endl; cin>>b; cout<<"enter c"<<endl; cin>>c; disc=(b*b)-(4*a*c); root1=(-b+sqrt(disc))/(2*a); root2=(-b-sqrt(disc))/(2*a); cout<<"root1"<<root1<<endl; cout<<"root2"<<root2<<endl; getch(); } any question or assignment ask to me!guys |
 | Alright so my problem is I am getting an error that says undefined reference to all of my functions related to DoubleLinked, DoubleLinked<string> dict, dict.add, etc. If anyone knows why that would be great. Thank you. Oh and if i add () to DoubleLinked<string> dict then i just have undefined … |
| | A dark mage casted a black spell On the fountain of life.So,instead of producing the elixir of life,the fountain now produces the elixir of life and the dark poison at rate r (litet/sec). the fountain will become deadly when the amount of poison is the as that of elixir in …  |
 | I am trying implementing a vector ADT by means of an extandable array used in circular fashion. So now I want to apply the doubling strategy to double the current size of array Wheenever the full exception happens, by using a template to make the vector work here are my …  |
| | I'm new to c# programming, and I am a little stuck on how to make a variable available across multiple forms. I read that i should make a public static class, however, my code is as follows: private void btnLogin_Click(object sender, EventArgs e) { accountNo = txtBoxAccntNo.Text; valid = validate(); …  |
 | Dear All, I require to download a webpage, analyse the html and from that html I have to identfiy some required images and download them for analysis.Please help as to which library I would have to download and install. Is cURLpp good for this.? for the image analysis thing i … |
 | http://libraryofcprograms.blogspot.com/2013/03/initializing-character-array-structs.html Is there any other way to initialize a chararcter type array in structs? |
| | Let f1 and f2 are two user defined functions. main(){ int *p; f1(&p) } f1(**p){ f2(&p);//If I've to pass the pointer by reference again in another function, will I've to do something like this? } f2(***p){ **p = NULL; } |
| | #include <iostream> #include <conio> #include <windows> void main() { int opt; cout<<"\t\twhich type of window you have\n\t\tEnter one for shoutdown for windows xp\n\t\tEnter 2 for windows 7\n"; switch(opt) { case 1: system("C:\\WINDOWS \\System32\\shutdown-s-t-0"); break; case 2: system("C:\\WINDOWS \\System32\\shutdown/s/t 0"); break; } getch();} using borland execute that program and shutdown your … |
| | Hello All, First - I am just a beginner at this (just started studying C++ this semester) so I am lost somewhat sometimes and I think I am making good headway with my first array, but, I can not get it to return any output in my console window. I'm … |
| | Question is Write a modular program (function) for problem given below. This program will let you enter the initial balance for the month, followed by a series of transactions. There is no limit on the number of transactions the program can process. A transaction takes the form of two input … |
 | Hello, *We are very much begginers at programming in general, and it would be great if you could keep that in mind when helping us!* Could someone please explain just what a **socket** is? We are working on a program which will solve a 3D puzzle, handed to us by … |
 | hey guys ! i have been given an assignment as pasted below : You will be given two files. Grid.txt will contain a grid of letters (as shown below) j q v r l k u v e r s i o n l d v k e r n …  |
 | Hello all. I wrote a program that gives me 100 random values from the range between -100 to +100. How am I supposed to find the minimum, maximum, and average of the values that will be listed when I run the program? I appreciate the help anyone can give me. …  |
 | Hi there, Years ago I posted in an InstallShield forum to see how I can detect if a patch has been applied on a particular machine programmatically. We have an update utility that will fire a Myapp.msp if it is detected in a particular folder. What is happening is that … |
 | hello guys ! I need some help.. "assume that the process happen in some restaurant. there are seat1 until seat10 in the restaurant. the customer(user) need to enter the seat number to select the seat that they want. the seat that have been selected by customer will remark by 'reserved' … |
| | Hello, I'm having a play with Qt and can draw what I want, perform transforms, more the origin with a translation but would like to know how big the area I have to paint on is and is it possible to control this. I've read the entries for things like … |
| | When I run my makefile I get this error: ** No rule to make target `videofeatures.cpp', needed by `videofeatures.o'. Stop. Here is my makefile CC = gcc CPP = g++ CFLAGS += BIN_DIR = ../bin INC_DIR = ../include LIB_DIR = ../lib INCL = -I$(INC_DIR) `pkg-config --cflags opencv` LIBS = -L$(LIB_DIR) … |
| | I want to change the color of the text in c++. I am using Turbo c++ 4.5 and Windows XP. I have used that textcolor(14) type code but it didn't work. It says : Call to undefined function "textcolor" in function main I have included header files iostream.h, conio.h, windows.h, …  |
| | Hi there guys. Literally I have been asked this question; "The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, … ; the first two terms are 0 and 1, and each term thereafter is the sum of the two preceding terms – i.e., Fib[n] = Fib[n – … |
| | I am given a number n and a number b. i have n products and for each product a grade like 'e' for electronics or 'f' for food. I must show only the products with a number of grades smaller or equal to my given b It's like: n=4 b=1 … |
| | If p is a pointer pointing a node to be deleted, then what's wrong in the following code: cout << "Do you want to delete this record? (y/n) "; if (getch() == 'y' || getch() == 'Y'){// Delete record. if (p == *ph){//If first node is to be deleted. *ph … |
| | Hey All! This isn't an important qusetion just an I don't get it question. So, this is out of my book....this is a default constructor clockType(); Ok. This is a constructor with parameters clockType(int, int, int) Thats all fine and good. Here is my quesiton. The default constructor is basically … |
| | I am a beginner in C++ and trying to learn it. I have a problem with this program. #include <iostream> using namespace std; int main () { int FirstNumber = 0 ; int SecondNumber = 0 ; cout << " This program will help you multiply two numbers " << … |
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| | Hello, I am Shien from Malaysia Good to meet you all here I found some problem when doing my final year project Now, I am doing a security system with using PIC18 My project is like this Sensor (digital sensor) detected -> signal send to my PIC18, then I want … |
| | **Hello people** I am in need of help with part of my program... **How can I edit a element in my percent list?** I want the user to be able to change the percentage (that is aready there) so that it can ... update, and then be sorted it... void …  |
| | hi, I have doubt about virtual function behaviour in below code snippet. As per my understanding class derive2 didn't override the virtual function fun() , so it is obvious that its object can't be assigned to the Base class pointer *p and even individually we can't instanciate the object of … |
| | Hi, I have overloaded new function but unfortunetly never been able to execute global handler for requesting more memory access on my compiler. I also don't understand as per below code snippet if we invoke the global handler for requesting more memory how it is gling to allocate to P. … |
| | Hey guys! I will be hosting an online hackathon next weekend. Please join (50 bucks reward if you win)... In this case, you are given a theme and you need to code something relevant to that theme. The coolest program will get the prize money. You are given 24hours to … |
| | Hello Everyone , Can some one please tell me what is wrong in my program. This is basically a program to insert a new node in a binary search tree. The thing is that my insert function is working correctly and the node is getting inserted which i am verifying … |
| | I am new to filing and have not much idea about it. I have written a code that tries to read an ASCII .pgm file named pic.pgm and writes it as mypic.pgm file: #include <fstream> const int MAXHEIGHT=221; unsigned char *bitmap[MAXHEIGHT]={'\0'} ;// pointers to each pixel row int main() { … |
 | For this assignment due **3/4/2013**, I have to write a program to read in and evaluate a post fixed expression. I also have to print out the expression read in followed by the results of the evaluated expression (while handling the add, subtract, and multiply operators) and handle multi digit … |
| | I have an xml file that I have to read in, convert all the carriage returns to \x0D and line feeds to \0xA, then call it into a function as a string. So for example my XML file is: <TEST> this is a string </Test> I would want a string … |
| | We cannot use constructors if we want that whenever a pointer is declared, it should be NULL. Am I right Sir? if I declare student *head, *tail, where student is a class, can I make my pointers automatically make NULL using default constructor?  |
 | Hey I have an code in Qt that is an QPushButton is hidden at start of the cpp but later i want to get it appear when the file is open and an line is readed but the problem i get an segmentation fault. Can be because the setHidden(true) in … |
| | Ok so am writing a program that simulates a computer system.The cpu and memory will be forked making memory a child process and cpu athe parent and i will be using pipes to let them exchange informatino. I am really lost tough on what to do next, i have loaded … |
| | write a program which display a restaurant menu, then ask the user to select a choice from the menu. Using the switch statement select the user choice. printout the choice the user slected and the bill amount.Include in the bill a 16.5% tip and 8.25% sales tax. |
 | Hey everyone need help on a project im doing in c++, so far I have made a command interpreter, that breaks user input into array of Strings sepperated by spaces and have a run function. Now I am trying to do the list() and list(directory) but I'm not quite sure … |
| | **please help me with this code ASAP** Problem Statement: You have to write a Schedule Management Program for the counsellors. Here are some facts: Facts: There are 10 counsellors. You have to Manage only one week's schedule. There are 7 days in a working week ten working hours in a …  |
 | Hello, i just started to study c++ and i have a problem about 1 porgram in the homework ! it ask me to write a c++ program that first asks the user if he want to enter a number if yes he enters the number and then ask him again … |
| | I am trying to figure out what it would take to create software like [MaxiVista](http://www.maxivista.com/) or [ScreenRecycler](http://screenrecycler.com/ScreenRecycler.html). I have good experience with Java and C++, but these two programs are just awesome and over my head. Basically, they take a window from one computer and transfer it to another. Does … |
| | Please can someone help me and send me in the right direction. I am making a program that reads a text file and then out puts the data into a datagrid, the text file looks like this: [HRData] 84 73 0 -124 0 50 84 73 0 -124 0 50 … |
 | I have been trying to call a C++ function in a DLL, from a C# WPF application I'm working on. I've done it before and it's worked but I can't remember how I did it and can't seem to find an example that works for me. I'm doing something wrong … |
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