49,761 Topics
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 | I was looking at this: [url]http://www.parashift.com/c++-faq-lite/ctors.html#faq-10.18[/url] I don't understand [code] File f = OpenFile("foo.txt"); [/code] It seems like File is one class, and OpenFile is a separate class, so how can you assign an OpenFile to a File? Also, is it necessary to have this second class? Why not something …  |
| | [ICODE] #include <iostream> #include <cstdlib> using namespace std; struct A { A *B; }; struct C{ C*D; }; int main() { A * Z = new A; C * Y = new C; Z = Y; cin.get(); return 0; } [/ICODE] it says cannot convert Z to Y in assignment.  |
| | [code] #include<iostream> #include<fstream> #include"d_nodel.h" using namespace std; int main() { dnode<double> *listA = new dnode<double>; dnode<double> *listB = new dnode<double>; double sz1, sz2; int val1; //first set of integers int val2; //second set of integers ifstream inFile; //declares the inFile ofstream outFile; //declares the outFile //Read in a file to … |
 | hello all, I'm getting some unexpected behavior from the ifstream object when using the open method. im reading the following characters from a text file: [CODE] ############### # #X# # # ### # # ### # # # # # # # ## ## # # # WWWW###WWWW # # … |
| | What is wrong with my sorting function? I am trying to put numbers in ascending numbers. [code] void sort(int array[], int numts) { int lowIndex, lowest; for (int count = 0; count < (numts-1); count++) { lowIndex = count; lowest = array[count]; for (int index = count + 1; index … |
| | hi i have a very large array that i want to populate but i don want to run the for loops every time so i thought i would right a program to output text to fill the array and was wondering if this would work. the array is [icode] int … |
| | i am working on my project which is on regeression of lines . well i have been successful in fitting a straight line to the given set of coordinates . since i have come so far after a lot of striving , i have been a bit exhausted on writing …  |
| | After much frustration of trying to figure it out on my own, I am finally ready to admit that I need help. Does anyone know how to compile allegro 5? (or better yet have a precompiled version I could get my hands on) I have tried many tutorials and none …  |
| | To redirect clog, I have been using this: [code] std::streambuf* clog_save; std::ofstream ofs; clog_save = std::clog.rdbuf(); ofs.open(LogFilename.c_str()); std::clog.rdbuf(ofs.rdbuf()); cout << "Test cout." << endl; std::clog << "Test log." << endl; std::clog.rdbuf(clog_save); ofs.close(); [/code] However, it seems like bad "code reuse" practice to have to put this in every program I …  |
| | I am trying to learn some c++. To do this I have chosen to write an emulator. I had it up and running, but decided to try to make a better architecture. I have a strange problem that I don't understand. If I compile the following code (Visual C++ 2000 … |
| | Hey everyone, I've been getting my rear end kicked by this homework assignment. We were given the task of writing up a command line version of Othello (Reversi) in a higher level language, which I chose C++ to do so in. My C++ version of the code is working great, … |
| | Hey... ok before i start i want to say that i'm not a very good programmer... and i'm new with this... and i got a project that i have to submit in 2 days so i badly need help!! ok the problem is: I'm using binary file handling, a code … |
| | so we are starting arrays and our task is to go back to our assignment 2 (functions) and he wants us to run the program using arrays. im pretty stuck and have no clue what to do. [B]heres how assignment (functions)2 looks[/B] [code] #include <iostream> using namespace std; void getEmployeeData … |
| | hi there, i do hope someone can help with my delima. yes this is homeowork but i am 80% through my program and only wish to get some guidance on my program. my program has a number of things it has to do and one the things i am having … |
 | Hello! I am making a postfix calculator and I want to add in some equation integrity checking. Everything seems to work ( it needs to be done some little improvements, but overall it is working), except when I am checking for the blank spaces the program do not work the … |
| | how im gonna loop menu if option not 1 or 2 ??? [CODE]void display( ) { int option; system("cls"); //clear screen cout<<endl<<endl; cout<<"\t * Display Menu *\n"; cout<<"\n\t1. Display For Certein Date"<<endl; cout<<"\t2. Display All Appointments"<<endl; cout<<"\nEnter Option Number: "; //Enter option cin>>option; cin.get(); switch ( option ) { case … |
 | As i have written Atoi(); Now i have written Itoa. Here I have used a method of getting the last digit stroring it in an array and then reversing the array to get the required answer. I look forward for Improvements in this code. [CODE=C++] /**************************************************************************** Function Name:: itoa(int ,char … |
 | Im currently doing a project in QT and when I compile my project with my header/source files that i created, I get this "error: expected constructor, destructor, or type conversion before ‘->’ token ". Essentially i've created my own classes outside of QT and my objects work fine etc but … |
| | Hi, I've been trying to identify the error in this code of insertion in a 2-3 Tree. I do know its something with the search function...Can some one figure out whats wronge with the code?? [code=language] bool Two3::Insert(int val) { int x=val; bool done=false;//inserted or not?? if (IsEmpty())//empty tree creating … |
| | for example the sentence in the text file is "daniweb offers the best solutions for C++. the website is www.daniweb.com." i have the user to search the word "daniweb". by using ifstream to read word by word, this is part of my codes [CODE] ifstream file ("lines.txt"); string word; bool … |
| | How can I clone an object in C++, so it is a seperate object, but exactly the same as the original? Thanks, - Moshe |
| | i want to make a prgoram that will read in a set of numbers and determine whether or not they are prime numbers, this is what i got so far any ideas? [code] #include <iostream> #include <queue> #include <vector> using namespace std; int main() { queue <int> input; queue <int> … |
| | I have this problem to solve for preparing for the olympiad and i'm not quite fond of the functions so that i want to do it classically but i find it harder.Here it goes: "During a desert operation a group of soldiers were lost from different squads.After the storm passed … |
| | my makefile: [code] DRIVER_SRC = PumaDriver.cpp PumaBody.cpp PumaMotor.cpp base_manipulation.cpp serialPort.cpp DRIVER_INC = PumaDriver.h PumaBody.h PumaMotor.h base_manipulation.h serialPort.h silvermax_commands.h All: $(DRI_SRC) $(DRI_INC) g++ -Wall -Wextra -g3 -fpic `pkg-config --cflags playercore` -c $(DRIVER_SRC) g++ -Wall -Wextra -nostartfiles -shared -rdynamic -o libPumaMotorDriver.so PumaDriver.o PumaBody.o PumaMotor.o serialPort.o base_manipulation.o install: cp *.so /usr/local/lib uninstall: rm … |
| | Hi I wonder how it will be possible to get the current date and time. I have looked around and there are many different ways to retreive this. I wonder what could be a good way to do that. As for now, I would like to return a string for … |
| | Metro supermarket is a new supermarket opening in Riyadh. It offers attractive discounts for its customers. Write a program that will display to the user his new total price after discount. The program should read the total price from the user, calculate and display the new total price based on … |
 | Mmm, I just love these error messages, I don't understand them what-so-ever and I can't interpret them. (Unsure where the post should be in the forum) I'm getting this error message at build time (Using VC++): [code=cpp]1>Linking... 1>main.obj : error LNK2019: unresolved external symbol _DirectDrawCreate@12 referenced in function "long __cdecl … |
| | I've been trying to solve this problem for a while now with no luck. I want to monitor an input buffer(cin) for a keypress. The catch is, I don't want it to hang if the buffer is empty. [INLINECODE]getch()[/INLINECODE] and [INLINECODE]peek()[/INLINECODE] won't work because one waits for a keypress and … |
 | Hello again all!!! I just have two quick questions... 1.) Is it possible for one to run a program through the "system(command)" and have the output come out on top of an SDL program? Like if I had a background of some sort and typed "system(echo "Hello!")" could I have … |
| | well i'm trying to get my shuffler to work but i keep getting one. any ideas? #include <cstdlib> #include <string> #include <ctime> #include <iostream> using namespace std; const int number_of_cards = 52; void shuffle(int list[], int size) { srand(time(0)); for (int i = 0; i < size; i++) { int … |
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