[c++] Forum Topics

I have a little confusion in my mind. I know very well the difference between preincrement and postincrement, postdecrement and predecrement. But i wonder how do these operators work during loop. I ,myself, use postincrement or decrement in loop as follows: for(int i=0;i<5;i++) { //code } But in my book …

Hi All, in below class i wanted to have two friend function(overloading) one with default argument and other is without default argument. but during compilation it gives error. could you let me know how to fix (overload) this by not changing the function name , argument type or number of …

write a c++ program to compute compound interest. the program should be structured as follows A function to compute interest and another function to compute amount **Bold Text Here**

Design a C++ program by considering the following conditions; 1. User must keyed-in “start” to start the program and “stop” to end the program. . 2. If the user keyed-in “choice1”, print out PATTERN A. 3. If the user keyed-in “choice2”, print out PATTERN B. Use if else statement, while …

Hello Everyone! I'm using C++ to write a small 2D app with SDL and OpenGL. I'm trying as much as possible to keep my code cross-platform. However, I've hit a bump. I can't find a good, easy way to display text on the screen. I am able to do it, …

C++ HELP: hello i made a program where user enter any message then fing its frequency and push it on the queue and sort it i want to sort it again by which element in the same piority entered please anyone can help>? for example for this message: "Eerie eyes …

Hi All, I know this is very silly question about singleton pattern but still it is first choice of interviewer. Could you let me know in below code snippet. (1) After deleting singleton object why still i am able to call show() method and it works fine. delete obj; obj=NULL; …

hi all i am new in qt/c++ i am trying to build a program with database using QTableView QLineEdit QComboBox.. the LineEdit shows a valiu the records filtered by that valiu.. now the ComboBox displays somenames with valius and what i want is that when i change the valius in …

I am getting below errors while compiling on V2013. I have benn struggling it for last 5 days. Any help much appreciated. ------------------------------------ error LNK2001: unresolved external symbol "double pnl::global_fakedummy" (?global_fakedummy@pnl@@3NA) 1>snpgm.obj : error LNK2001: unresolved external symbol "private: static class pnl::LogMultiplexor * pnl::LogMultiplexor::s_pStdMultiplexor" (?s_pStdMultiplexor@LogMultiplexor@pnl@@0PAV12@A) ------------------------------------------------------------------------------------------------ pnlFakeptr.hpp #ifndef __PNLFAKEPTR_HPP__ #define …

User input/output is a key component in the programs you write, yet most online tutorials just provide a quick-and-dirty method of grabbing data. In other words, it works right up until the point the user does something unexpected. In this tutorial you will learn how to avoid the common mistakes …

(i'm using win7) i can use the Region functions for get the transparent control. but, in some cases, i can get bad resoltes(. i have read that i can use brushes for get the transparent control. can anyone explain better?

Hi, I am writing a program to read from a file. I want to ask the user for the file name to open. I have tried to use the basic open file code from cplusplus.com and it won't work unless I specify the file name in the code. If I …

So this friend, the boyfriend of another friend, is interstd in acareer as an IT, he knows quite a lot but wants to learn C++ so I reccomended Daniweb as a source of information. I don know I dont if he will join but I'm spreading the word about Daniweb.

Hi all, I'm new to this forum. I'm learning C and embedded SQL. I have a question. In one of the project am doing, i want to check whether any records with a particular local_id and global_id is there in the database with in the last 90 days. If it …

Hi all! I am working on creating an SMS language translator (SMS -> real English), and I am having trouble initializing a map for the SMS -> English codes. My code is below: map<string, string> THE_SMS_CODES{ ".02","Your (or my) two cents worth", "10X", "Thanks", "2MI","Too much information", "2U2" ,"To You …

This might sound crazy or something, but i've always wanted to build an Operating System like Windows where people can do everyday things I know some people do not like the new Operating System and that the new screens look atrocious. Also I need a group at least five or …

how to make this pagehttps://www.facebook.com/ on console screen and also set the size of cotrol screen to window size???????? i anyone can help i all apricate it?

hello guys i have a favour to ask i would like to help me out with this problem .. 4) Write a method binaryToDecimal that takes a string as argument (the string consists of a sequence of ’0’ and ‘1’ characters representing the binary representation of a number) and returns …

Hi, As we know constructor doesn't have any return value so it is not good idea to perform exceptional handling inside constructor.SO i would like to know if i am opening a file inside constructor and due to some reason (file not exist) failure happened inside constructor then how to …

In turbo c++,how can i copy a certain file from one drive to the other e.g,the file is located in G:\one ,i want to copy it to C:\tc the file name is "file.txt"...Much love

I'm working on a project for a tic tac toe game. I'm working on this with a partner (assigned) but he has kind of fallen by the wayside. Here is the assignment: Filenames: ttt.h, ttt.cpp, tttmain.cpp Your second project will be completed with a partner. For this project, you will …

Hello. I have a few Qs about Hash tables. how does `std::hash` return a `std::size_t`? for example how does it convert a `std::string("Hello")` to `std::size_t`? How do these functions work? i have no idea what's `hash_combine` and `seed` do in `hashval.hpp` This is from STL 2nd edition. hashval.hpp #include <functional> …

Hello I am tring to write a code to generate random numbers into an array, I don't understand why this isn't working. please help #include <iostream> #include <ctime> #include <cstdlib> const int NRows = 5; const int Ncols = 5; using namespace std; int main() { //declare variables int num[NRows][Ncols]; …

title says all.......! oid diamond(int n); // where n is the number of stars in the middle row what it shows me

void diamond(int n); // where n is the number of stars in the middle row. You can assume that n is odd. (You can change the prototype of the function diamond)

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With regard to C++ books, I'll just echo the advice here .The following books are recommended; read them in mostly the order listed." Accelerated C++ " Andrew Koenig & Barbara Moo " The C++ Standard Library " Nicolai Josuttis --- a "must have" " Effective C++ ", " More Effective …

Quite a while ago, I made [URL="http://www.daniweb.com/code/snippet217147.html"][B]this[/B][/URL] snippet. This code is basically the same, except that it adds animation. This method of blitting is very fast assuming you don't use a surface that's too large. On a 500 x 500 surface, I managed 350fps using only 0-1% of the cpu. …

Does C++ have predefined text constants / string constant to be used as replacements for digits when testing errorcodes ? An example: if (errcode == 17){ std::cout << "The file already exists!" << std::endl; } To make it more readable I can write: if (errcode == FILE_ALREADY_EXISTS){ std::cout << "File …

# What's the problem in output where the algorithm was correct ???? # #include<iostream> #include<stdio.h> using namespace std; main() { int LA[100],K=1,N=5,L;//K=POSITION...N=element for(int i=0;i<=4;i++) { cin>>LA[i]; } L=LA[K]; for(int J=K ; J<N-1; J++) { LA[J]=LA[J+1]; } cout<<"DELETE ITEM:"; N=N-1; for(int P=0;P<=4;P++) { cout<<" "<<LA[P]; } }