51,593 Topics
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| | Hello everyone! Recently I have been incredibly interested in language design/implementation. I have written multiple functioning language front ends (Lexer, Parser, some execution) and have decided a few things. My systems are getting ugly, there needs to be more abstraction I can't execute code in the parser -- it's just … |
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| | Should I be using std::wstring or std::string and wchar_t or char? All this unicode stuff is confusing me. I want my application to work on both windows and linux without too many problems and changes but I'm considering unicode vs. ansi. Any ideas? I ask because I see many applications … |
| | What I know is Linear Search and Sequential Search are same, if my knowledge is correct then kindly guide me wether the below algorithm work for linear search or not as it is a Sequential Search algorithm. > Step 1. Initialize searcharray, searchno, length. > Step 2. Initialize pos=0. > …  |
| | Hi all, I want to create all possible combinations of a full binary tree which must have exactly 4 leaf nodes and 3 internal nodes. I want to create it using recursion and tree must be simple binary tree not a binary search tree or BST. Kindly suggest algorithm to … |
| | I've been working on a small API/Library and I realized that I was returning memory that wasn't going to be consistently put on the heap or stack. So my question is this: when I return an object from a function in a Library, should that object be on the heap? …  |
 | > WE'll be taking inorder traversal of the tree and during the traversal will modify the right pointers only(using method "make_right") such that a linked list is formed having only valid right pointers. Then another method "make_left" is called to make the left pointers of the nodes point to valid … |
| | Hello Everybody I am successful in displaying Diagonal Array elements, but failed to display Non Diagonal array elements I tried a lot but unsuccessful. Here is the code what I am try with - #include<conio.h> #include<iostream.h> void accept(int a[4][4],int size) { cout<<"Diagonal One:"; for (int i=0;i<size;i++) for(int j=0;j<size;j++) if (i!=j) … |
 | Hi I'm trying to create an array of function pointers contained within a class, the C++11 way. Can I have some help with this as I'm getting a bit mixed up. Here's what I have done so far. They are made up classes to define the problem. #include <iostream> #include … |
| | Hello again. I am stuck with this example: #define Listof(Type) class Type##List \ { \ public: \ Type##List(){} \ private: \ int itsLength; \ }; could anyone explain to me what is the intention and the point in this example? beacause I found this example in a book but not … |
| | I'm working on an ATL dll, under C++ VisualStudio 2008. I would include an RichEdit 2.0 Control in an AxDialogImpl dialog. To use RichEdit 2.0 it is needed call AfxInitRichEdit2(). I did it in a non ATL project with no problems, but in the ATL project I have an C3861 … |
 | Hello guys: I am certain if I was not trying slef-teaching C++, that this question would have been answer before. What is the use of [inlinecode]using namespace std;[/inlinecode] ? I am not certain, I just know that when I use [inlinecode]#include<iostream>[/inlinecode] I have to appended. Simple question, but a matter … |
| | CSCI-15 Assignment #1 — Functions and files review (40 points), due September 9, 2013. Write a program to read the coefficients of a series of quadratic equations from a text file and print the associated roots, or appropriate errors if there are no real roots, to another text file. The … |
| | I am mainly into system dev, writing kernels and kinda just building everything from the ground up... But I also like game dev and is interisted in the whole concept. So I am going to make this easy, seing as a lot of things can change the output. A programmer … |
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| | #include"Gradebook.h" #include<iostream> #include<conio.h> #include<string> using namespace std; Gradebook::Gradebook( int balance) { if(balance>=0) { balance=balance; Withdraw(balance); } else { cout<<"Balance can not be negative\n"; } } void Gradebook::Withdraw(int) { cout<<"Enter amount to withdraw\n"; cin>>credit; if(balance>credit) { cout<<"invalid credit greater than balance\n"; } if (balance<credit) { int total=balance-credit; cout<<"Current balance:"<<total; } getch(); …  |
| | CSCI-15 Assignment #1 — Functions and files review (40 points), due September 9, 2013. Write a program to read the coefficients of a series of quadratic equations from a text file and print the associated roots, or appropriate errors if there are no real roots, to another text file. The … |
| | So, I've been through a class in java so I know a little bit of what I'm doing... The assignment I have is to create a program that takes a string and converts the letters four away in the alphabet (ie: a becomes e and so forth). I've gotten most … |
| | Hello everyone.. Would anyone know why I can't do the below. I'm not the best programmer in the world so I'm wondering why the below won't work. I get an error 'A template declaration cannot appear in block scope' No doubt it's due to my lack of understanding of the … |
 | i am given this topic array - object oriented programming for report. i just some of your advise do i need to discuss OOP? including like inheritance, encapsulation, polymorphism ..etc.. or should i discuss only concepts of arrays definition etc... any addition to my outline: definition of arrays types (single-multi) … |
| | I am getting Wrong Answer on submission. Problem link:http://www.lightoj.com/volume_showproblem.php?problem=1039 Code:http://ideone.com/1iMkOX I implemented the BFS inside the main function instead of coding it in a seperate function. |
| | CSCI-15 Assignment #1 — Functions and files review (40 points), due September 9, 2013. Write a program to read the coefficients of a series of quadratic equations from a text file and print the associated roots, or appropriate errors if there are no real roots, to another text file. The … |
| | Im trying to figure out how to read a file that is entered into the command line. I tried using #include <iostream> #include <fstream> #include <cstdlib> #include <string> int main(int argc, char *argv[]) { std::string a; int b, c, d; std::cout << "please enter the name of the file: " …  |
| | Create a program that will input a number in kilowatt and display its equivalent masures in watts. PLEASE ANSWER. :) |
 | I'm working an SSE / AVX library and have almost all the basics working, but now I'm trying to get the accuracy / speed a bit better on certain functions. Essentially I'm using a minimax polynomial that when using infinite precision should give me ~2E-9 error, plenty for floats for … |
| | I have a class person, with a first name, last name...ect. The user is prompted a menu and I am having trouble with the option to delete a name. It seems the string variable is not getting updated when the user enters it and another prob is getting an infinite …  |
 | Hi Guys, I was wondering if someone could help me with this small program, i am kinda new to programming and well i have been given this assignment on collision detection for airplanes. i have done some coding implementing the algorithm and well i have specified the coordinates or points … |
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| | Hi, I'm creating remote desktop application in qt 4.8. I have to implement some way to browse remote computer directory structure and possibility to download files on local machine. I'm wondering how can achieve this... ![Member Avatar for [Prototype]](https://static.daniweb.com/avatars/orig-avatars/avatar913340.gif){kind=avatar} |
| | Can someone help me with solving boolean expressions with the help of forward chaining. A good tutorial will also help me. Example: A.(A + B) = A A.(A + B) => A.A + A.B [Applying distributive law] A.A + A.B => A + A.B [Applying idempotency law] A + A.B … |
| | I'm trying to solve a cryptarithmetic puzzle TOO + TOO + TOO + TOO = GOOD using a program. My solution to this, is to use a nested loop for each unique letter (in this case T, O, G, D). The loops would systematically assign the digits from 0-9 to …  |
 | I was just wondering what kind of behavior is expected when hooks are set, I can modify my code to test it (which isn't really necessary), but I was hoping it's normal for when hooks are set for input to be buffered for a few seconds and then display. If … |
| | how to solve pattern given below using nested for loops.. * * * * * * * * * *********** somebody please help me with the logics.  |
| | hi all !! i am new on that forum, and i have just started C++ programming, i know some basics. now i would like to start developping a program, i need some idea that could be evoluted everytime, so i work on it while i improve my programming skills. thanks … |
| | the basic idea is that i have a config file where i need to take entries in different formats(the key is always a string and the value could be any type: int, float, string etc) from and the file has the following style: firstentry 1.5 secondentry 35 thirdentry somestring and … |
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 | I'm trying to make a simple linked list example. I am using the dynamic method of memory allocation. #include <iostream.h> struct node { int INSTRUCTION; node * next; node() { next = NULL; INSTRUCTION = 0; } void setnext(node *P) { next = P; } void DELETE() { delete this; … |
 | What is the best and efficient way of redirecting streams from a parent process to child process. There are a number of ways i found out like boost.process, fork() and createprocess(). But what is the best way for windows? |
 | How to apply graphics in Microsoft Visual Studio C++ Express 2012? |
 | #include <cstdlib> #include <conio.h> #include <iostream> #include <stdlib.h> using namespace std; int main(int argc, char *argv[]) { int x,ctr; cout<< "Enter a day: "; cin>> x; for (ctr=x;x>0;x--) for (ctr=1;ctr<=12;ctr++) { switch (x) { case 1:cout<< "On the first day of Christmas\nMy true love sent to me...\n"; break; case 2:cout<< … |
| | I want to calculate the formula in C++ program. Put all 5 formula inside the program but just run 1 formula only. For example, run the current ratio formula only. If you want another formula then just adjust the coding. Then the second formula will run. Just adjust inside only. … |
 | hello; how to access to a control of a form from another form? example datagridview |
 | Write a program that converts numbers to words. For example, 895 results in "eight nine five." here are my codes: #include<stdio.h> #include<stdlib.h> int main() { printf(">>This program converts numbers to words :)\n"); int value; printf("Enter value: "); scanf("%d",&value); switch(value){ case 0: { printf("zero"); break;} case 1: { printf("one"); break;} case … |
| | Hello everybody. I am seeking help on how to save 3 output images into a specific path after filter by 3 different mask size e.g. 3x3, 5x5 and 7x7 mask. My program is in C:\Cpp\Project\, I wish to save those output images inside "filter" folder with path in C:\Cpp\Project\filter. Thus, … |
| | Inline Code Example HereHi guys, below is a function which converts ebcdic to ascii and it works for a buffer, i need to modify it in accordance to a file,which i am unable to do as i am not very good with C, tried my luck everywhere but did not … |
| | I want to know how this function is working. I used qsort() function to sort the integers in an array and i found this compare() function on internet. It worked perfectly well but i cannot understand how is it working and what's its logic. Any help? int compare (const void … |
| | Hellow...How to count and sum even and odd integers from a sequence of integers..? |
 | [LIST=1] [/LIST]Hello again :), I am writing a code that will recursively write a string in reverse. The problem is in my recursiveReverse function. I feel like the idea is right, but the implementation is incorrect. My thought process was that I could start the loops at the beginning and … |
| | This is a code for removing spaces from a string, I've been asked to do this without using any standard library functions like `isspace` or `'\b'`. I've been trying for a lot of time but it always gives the same error > Error : Cannot convert 'char' to "char *" … |
| | I do c language "httpd" application works without problems at first. 1. meet user requests from nginx ago 2. Looking to requests from. Directs incoming requests according to the address 127.0.0.1:8080 But how can I solve the query is loaded when the crash occurred. #include <stdio.h> #include <stdlib.h> #include <string.h> … |
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