51,593 Topics
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| | I need an explanation of Auxiliary operators. I understand that they are not members of a given class. But how do you use them? Particularly in overloading operators situations.  |
| | Hi! I'm really new to all this so please excuse me if I'm not providing enough information for anyone to answer my question. I'm getting this error: [code] error C2079: 'Playlist::PLarray::playlists' uses undefined class Playlist [/code] and it's referencing a line in my PLarray.hpp file-> see *** PLarray.hpp: [code] #include …  |
 | I have to write a program where the input is a Boolean Expression and the ouput is the corresponding sum of minterms for that particular expression. My idea is that i need to convert the infix boolean expression to a postfix expression. From there I need to construct the truth-table … |
| | :eek: I have been working on this for hours now... I am trying to enter a string and then count the words in the string. Only problem is my book is no more than a paper weight, and other online areas are kinda confusing. Can someone point me in the … |
| | (for reference i am in c++, windows, borland 3 compiler)hey guys here is what i want to do, i am trying to save a file using <fstream> but want the player to pick a name to save the file as, so to do that i have to modify the string … |
 | [code] Mode13h The Beginning of 3D/2D Graphics [/code] [B]Intro[/B] Lots of people want to know how to do graphics but find most APIs like OpenGL, DirectX etc too complex for a beginner, especially as they involve GUI code which follows a different approach from the simple dos programming Here, I … |
| | I'm trying to write a program that mimics a calculator where the user inputs two integers and the operation to be performed. Then I want it to output the numbers, the operator, and the result. I need to use a switch statement and I'm very confused on what to do … |
| | We have a homework problem that we had to modify. we had to make the user input their name and a radius to compute the area. The program was supposed to ask the name before it asked the radius. I have two problems i can not get the program to … |
| | hi-i hope someone can help me.. I am creating a linked list of nodes, I am trying to insert a new node alphabetically by strcmp the name field. I keep crashing at this point... you will see in my code below, I can add to the front of the list … |
| | ok here is my question, i use borland c++ builder 3 and in a book i found an example for a graphics.h program which is supposed to work but i have heard that this only works in dos mode not in windows (which i am running in) is there another … |
| | I am new at programming and need help: #include <iostream> #include <cmath> using namespace std; int main() { int a, b, c, area, tri_area; area = tri_area(a, b, c); if area (area>0); cout << "Area is "<<area<<"!"<<endl; cout << " Those values tri_angle " <<endl; } double tri_area (double a, … |
| | I am having a problem with inputs. I can get the input using the cin command but i want to use the input to open a file with the inputs name ie the user types in FRED. cin>>name i want to open a file called fred.txt ifstream in("name.txt"); the above …  |
| | i keep getting error messages when i try to build my program: EmpType.obj : error LNK2001: unresolved external symbol "public: __thiscall SortedType::SortedType(void)" (??0SortedType@@QAE@XZ) EmpType.obj : error LNK2001: unresolved external symbol "public: void __thiscall SortedType::ResetList(void)" (?ResetList@SortedType@@QAEXXZ) I also get the same error for InsertItem,GetNextItem,DeleteItem,RetrieveItem,LengthIs any help in understanding this would be … |
| | Hello all, im writing a c++ program to interact with an SQLServer database. my code will run a query and retrieve data fine. for example SELECT data FROM TestTable returns all strings from the data column. but when i run the following statement INSERT INTO TestTable (data) VALUES ('HELP') i … |
| | The assignment is to read and keep records and perform statistical analysis for a class of students. This is what I have done so far,then the codes can show the information(Id,4quizes,exam) of each students on screen. But I need to show 3 more things (The Highest ,The Lowest,The Average of … |
| | I have a fairly simple C++ program problem. This program is suppose to read in two sets of coordinates (x,y) and report the magnitude, distance, and where on the plane the points lies. Here is my code so far the whole thing works except for the location function. We haven't …  |
| | I keep getting this error message and I cant figure out how to fix it. Im not sure whether I have been trying to fix it for to long or somehting that maybe im not seeing the problem: ItemType::ItemType' : error in function definition or declaration; function not called it … |
| | I have a couple of questions about the main function. Do you need to put the ; after the last }? Do you need to put a return statement before the last }? If so, what number do you put in the (), i.e. return (0), return (1), etc. What … |
| | I am a new member of the free Unix sdf.lonestar.org. I tried to compile and run a C++ program I wrote, but it would not let me compile. I wonder if it's because I haven't paid the $36. Arpa membership fee yet. Does anyone know if this is the problem??? … |
 | i can't for the life of me figure out how to write int num; num = rand() %. ... i need a range of 0 to 1 I want to store either zero or one to num. That is my goal. plz help (i'm a noob obviously) |
| | hey i am making a game and decided that i want to put a load/save option in it and was wondering if anyone here knew how to do this, (the program has to be able to close, open again and load the progress from before). I am running in windows … |
| | My homework assignment is to implement a class that represents a set of integers. Each set object may contain up to 100 integers. The main program will allow the user to create up to 10 different Set objects and perform actions on them. Actions such as return the interaction, union, … |
| | Okay, I'm trying to do my homework, but my code isn't doing what I want it to. What I'm trying to do is have the user enter a file name and then the program will output the number of words in the file. It works fine the first time through … |
| | [CODE][#include <iostream.h> void initialize(int& coke, int& pepsi, int& dry, int& hires); void sales_type(char& sale_type, int& brand, int& quantity, int& coke, int& pepsi, int& dry, int& hires); //void clearline(); void purchased(int& brand, int& quantity, int& coke, int& pepsi, int& dry, int& hires); void sell(int& brand, int& quantity, int& coke, int& pepsi, … |
| | Hi, guys I needs someone to help me.I do have difficulties to understand functions in c++. If you can help with more tutorials.I will saved.. Please,even some good web sites where I can practice. Thanking you in advance |
| | :?: I am attempting to write a C++ program that has the results of a T/F test. It takes the information from a data file and then it compares the students answers to the correct answers. I have two problems. First the data file has the first 8 characters as … |
 | [b]Declaring Objects[/b] When one works with classes, each instance of the class which is defined is known as an object. C++ is an extremely object oriented language (perhaps not so much so as Java, however). In OOP, or Object Oriented Programming, one can easily perform multiple tasks on objects which … |
| | Hello everyone! I am planning to build a database application for my school to maintain school lockers. However, I have a few questions regarding that application: [list=1] [*]Is it possible to use access databse with C++? [*]Is there anyway to authenicate a user with C++? [*]How shoud I go about … |
 | [FONT=Comic Sans MS][SIZE=2][COLOR=Magenta]Write a program which reads a text from a file declared by the user. If the file does not exist a message should state this and the program should be terminated. If the file opens with success the program should read the text and then output the uppercase …  |
| | hi all ;) i'm fairly new with c++ and i'm having some problems with a dynamic array of structures. I've declared the array with the syntax structname *pointername= new structname[3]. Now, if i try to assign to one of the structures members a value the compiler (visual c++ 2003) gives … |
| | I am new to c++. May anyone please help me with what need to be done here? SetRate(RateType aRate) In the function, SetRate(RateType aRate), you need to set the tax rate (mRate)for the RateType being passed in. But what is the rate? For LiveInWorkIn - 1.6%, LiveOutWorkOut - 0%, LiveOutWorkIn … |
| | [b]kimfalk[/b] posed a question about static functions in a class in [url="http://www.daniweb.com/techtalkforums/thread19241.html"]http://www.daniweb.com/techtalkforums/thread19241.html[/url] to which my reponse was duly correct by [Quote=Narue]You're mixing up your statics. :) static is overloaded for too many different uses. In a class declaration, static means that the name belongs to the class and not to … |
| | Can someone help me find the error that keeps this prg from running thanx [code] #include <iostream> #include <vector> using namespace std; int main() { vector<int>v(1,1); v.push_back(2);v.push_back(3);v.push_back(4); vector<int>::iterator i=v.begin(); vector<int>::iterator j=i+2;cout<<*j<<""; i+=3;cout<<*i<<""; j=i-1;cout<<*j<<""; j-=2; cout<<*j<<""; cout<<v[1]<<endl; //output 1 (j<i)?cout<<"j<i":cout<<"not(j<i)";cout<<endl; //output 2 (j>i)?cout<<"j>i":cout<<"not(j>i)";cout<<endl; //output 3 i=j; i<=J&&j<=i?cout<<"i and j equal":cout<<"i and … |
| | 1)UNIX operating system uses [B]Round robin Time slicing with multilevel feed back.[/B] Assume that there are [B]10 processes [/B] waiting in a queue which is implemented as a [B]linked list of PCB’s [/B] ( process control blocks). Assume the PCB have information about [B]Process ID , CPU burst time required … |
| | Hello everyone, I have just started learning C++ and I am trying to write a program that reads from a file (scores.txt) and then prints the average of these numbers to the screen and print to another file named "average.txt." I have written some code but when I compile I … |
| | Hi, I need help changing this code to reference the variables rather than using the return statement. This is as far as I have gotten and my brain is mush...Please help. Thanks! #include <iostream.h> #include <conio.h> void main() { int numDrawers; int x=0; double total; //int getDrawers(); //int getWood(); double … |
| | This is my first attempt at creating a program and I am having great problems. The program is meant to scan a file and increment a counter if specific words are found. Can anyone let me know where I'm going wrong,Thanks #include <iostream> #include <fstream> #include <string> #include <iomanip> #include … |
| | On all software programmes whether trying to print images or documents or anything I get the message: Microsoft runtime error with programme.exe and abnormal program termination which then closes the programme I am working on. Can anyone help please......grateful again to you all Lee  |
| | i am having a problem with a function i am writing that takes in a txt file and stores the data in 3 arrays. The data file is always rows containing three numbers such as 1 2 3 2 3 4 5 6 7 8 9 10 with each column … |
| | Hi all. Here are two questions to begin with: 1. What is the difference between the C++ standard library, and the C++ standard template library? 2. You know how Java has the API & documentation info. for all classes available? Where can I find similar documentation for the C++ standard … |
| | I know everything that i want to do but i never did a menu before so i dont know how to go about doing so if at all possible can someone post a sample program that uses a menu-selection with subprograms for each. This here is something like what i … |
| | 1)UNIX operating system uses Round robin Time slicing with multilevel feed back. Assume that there are 10 processes waiting in a queue which is implemented as a linked list of PCB’s ( process control blocks). Assume the PCB have information about Process ID , CPU burst time required , amount … |
| | #include <iostream> using namespace std; #include <string> #include<cstring> int main() { char list1[50][31],list2[50][31],list3[100][31]; int i, size1, size2, i1, i2, i3; char ch; int inf; ifstream indata; ofstream outdata; // read each list while(inf.peek()= EOF) { inf>> list1; i++; size 1=i; i=0; } while(inf.peek()= EOF) { inf>>list2; i++; } size 2=i; … |
| | I want to learn a good programing languge and was wondering if c or c++ is a good languge to learn I know HTML and some Java. :(  |
| | Hi, i want the best program to compare CPP files, i tried Araxis and Beyond Compare and ExamDiff, all compare good, BUT, the problem is that i want a program which compares the WHOLE file, then gives me the REAL differences, meaning ..., let's say there's a TEST1::TEST2 (int x) … |
| | Im just beginning on C++, and one of the main problems that Ive encountered that I would like to get past is the fact that with simple programs you can only enter one thing, and after the code executed after that function is done, all you can do is press … |
| | I have read in problems "INFIX" AND CHANGED THEM TO "POSTFIX" or RPN notation, however i need to evaluate the problems and i can't get this to work. I am not sure where to go from the infix to postifix i have. Please help. My Stack.h is just a basic … |
| | I have decieded to learn c++ just wondering what compilers you would all suggest? thanks |
| | Can someone help me please? I've got 17 errors and 3 warnings. The main problem is that it keeps telling me that "Triangle" isn't a class name :confused: i'm so confused. Could you also help me with any other problems that you see? Thx in advance. (list of errors at … |
| | I am working on a lab and having trouble developing a class to run with the program. I have completed all the arithmetic for the program but not sure how to included the functions in with a "class". The instructions are to develope class called "rational"- and should contain the … |
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