49,757 Topics
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| | I'm a student working on STL containers which were not formally taught in class. The website I typically follow hasn't helped, and neither have my textbooks. I'm getting an assertion error with this "while" loop. Probably something obvious to someone who works with C++ STL... There's an explanation for all …  |
| | Hello again. I am currently using a base class for a certain type of object, which looks like this: [CODE=C++]#include <vector> template <class T> class CObject { public: inline virtual ~CObject () { } virtual std::vector<T> *Output (std::vector<int> *Input) = 0; };[/CODE] The problem, that arises from this contraption is, … |
| | I have the code runnig and it is all right. but within my loop I have it set from 0- 100 but my cout << only shows 59 - 100. I have tested the code with other numbers such as 20 -50 and 0 -38 .... and I see that … |
 | Hey, I'm just wanting to know how i can make some code so no random numbers are the same, I've got this so far to get the random numbers and display them but tried this and that and couldn't get it to work. [CODE=C++]#include <iostream> using namespace std; int main() …  |
 | Hi Guys, i just wrote a program to print a sentence backwards using recursion. But i'm not too happy about it, if someone can give me a more optimized solution i'll be glad. You have to use std::string class. input: where the streets have no name output: name no have … |
 | Hello everyone! I am new to C++, and still haven't got to grips with objects, inheritance etc. etc. Anyway, here's the question - [CODE]class mainFrame : public Gtk::Window { private: library *m_library; player *m_player; }[/CODE] How can member m_player, when finished playing a track, access m_library to select the next … |
| | can anyone there help me about my problem in displaying a record of names,gender,annual salary and age..the inputs are the first name,lastname,gender,birthday and monthly income...i just have a hard time implementing it coz i have to use a string to deal with the name..how will i make it???just a hint.... |
| | [CODE=LANGUAGE]#include<iostream> using namespace std; class Nibble { private: union { int number : 4; }; public: Nibble(int=0); friend ostream& operator<<(ostream&,const Nibble&); friend istream& operator>>(istream&,Nibble&); }; inline Nibble::Nibble(int n) : number(n) { cout << "constructor.." << endl;} ostream& operator<<(ostream& nout,const Nibble& n) { return nout << n.number; } istream& operator>>(istream& nin,Nibble& …  |
| | Is there a way to save in a text based game through the MSDOS window? I want to be able to save the variables that store the mana, health, ect of a player.  |
| | I am using borland compiler... i need to define 4 gloabal arrays of double type that can store 5000 values like double d[5000],d2[5000],d3[5000],d4[5000].. and an array of objects of class data whose syntax is: [code]class data { public: int x,y; double s,w,e,d; }d[5000],f[5000];[/code] i am facing two errors: array size …  |
| | I am having a problem getting a certain part of my program to loop. I need the loop to repeat if 'Y' or 'y' is picked after a menu item is chosen. And if 'N' or "n" is picked print the receipt. I have tried numerous times to get the … |
| | I recently wrote a cpp file that I'm questioning. I'm unsure of whether the approach I took is correct or if it will cause damage to the heap. The goal of the project is to be able to do "clean-up" on dynamically allocated memory by storing the created object in … |
| | I need help on making a sine wave I'm trying to do the equation y = Acos(2 (pi)/B x - 2(pi)/B P) amplitude A, period B, and phase shift P. It is not working out too well so can anyone help me refine this? [code=c] #include <math.h> #include <stdio.h> #include …  |
| | Hello all, I am not taking a class or asking for help with homework. I am attempting to learn C++ on my own and I do not understand the logic within one of the sample programs within my book. [code=Cpp] #include <iostream> #include <string> int main() { using namespace std; … |
 | Hi, I have a gizmo attached on serial port and need to detect changes of controls signals DSR, DTR etc. no data, just changes (edge). I do it with MSCOMM.ocx and it works, but only when is CPU on idle and windows messages are delivered on time. When is load … |
| | given x and y (the field dimensions) and x*y numbers, (pieces of cheese on each square) calculate the best way for the mouse to get from (1, 1) to (x, y), he has to get as many cheese as possible... also you can only move closer to the (x, y) … |
| | I am working on the code that reads an enum. It seems to point to an address instead Here is the code thanks for any help [code=cplusplus] ////////////////////////////////////////////////////////////////// //contribtor.h #ifndef CONTRIBUTOR_H #define CONTRIBUTOR_H #include <iostream> #include <string> using namespace std; //================================================================ //CONSTANT DEFINITIONS enum Gender {Male=0, Female, None}; class Contributor … |
| | The aim of the program which i am writing is to convert strings of DNA. The DNA is in a text file and represented by the letters A, T, C, and G. Reading in the file and outputting the converted DNA is easy. However i want to save the converted … |
 | All I need to know is how a good way to make sure integers between 1 and 52 wont be draw twice over in a for statement... I was thinking something like [code] srand (time(NULL)); int *drawn; //The card to be drawn int notdraw[52]; // All the cards that have … |
 | Hi guys, I tried rewriting my C-ish C++ function to true C++, but I'm failing so far: The first function (working) [code=cpp]const visualPart * entity::getVisualPart(unsigned int wantLOD){ for(unsigned int i = 0; i < visualEntity.size(); i++){ if(visualEntity[i]->LOD == wantLOD){ return visualEntity[i]; } } return NULL; }[/code] And the second (not … |
| | when i m using this code: its not complete code..assume everything is right... [code] for(int result=0;result<g;result++) { u1+=((a[result].real_z1*tw[result])/sumd); u2+=((a[result].imaginary_z1*tw[result])/sumd); u3+=((a[result].real_z2*tw[result])/sumd); u4+=((a[result].imaginary_z2*tw[result])/sumd); } cout<<"\n""Value of U1:"<<setiosflags(ios::scientific)<<setw(10)<<setprecision(8)<<u1; cout<<"\n""Value of U2: "<<setiosflags(ios::scientific)<<setw(10)<<setprecision(8)<<u2; cout<<"\n""Value of U3: "<<setiosflags(ios::scientific)<<setw(10)<<setprecision(8)<<u3; cout<<"\n""Value of U4: "<<setiosflags(ios::scientific)<<setw(10)<<setprecision(8)<<u4; ofstream abc; abc.open("result.txt", ios::out | ios::ate); abc<<endl<<endl; abc<<"Data at position [ "<<i<<" , … |
| | Hi guys, its me again.. I was wondering if anyone could tell me how to test a character if it is within the ASCII range, like say in the following pseudocode: [CODE] ifstream in; in.open("file.xxx", ios::binary); if(!in) { cerr << "file.xxx could not be opened. \n"; } while (!in.eof()) { … |
| | Please help me doing my homework. this homework done with C++ Data Structure. This is Questions: [URL="http://img520.imageshack.us/img520/4417/qqqq1gvq5.gif"]http://img520.imageshack.us/img520/4417/qqqq1gvq5.gif[/URL] [code]#include <iostream> #include <stdio> #include <assert> #include <string> #include "bt.h" class Calc { public: } ; int main() { bSearchTreeType<Calc> obj; string command; cout<<"I-Inputtheexpression"<<endl; cout<<"N-InorderTraversal"<<endl; cout<<"P-PreorderTraversal"<<endl; cout<<"O-PostorderTraversal"<<endl; cout<<"F-Numberofoperatorinthetree"<<endl; cout<<"E-Evaluatethetree"<<endl; cout<<"Q-Quit"<<endl; cin>>command; do { … |
| | C++ reading text files I have a program which I am writing which manages a savings club. I have set up a functions which creates members (there are two members types) and outputs there data to a text file a line at a time in the format string, int, int, … |
| | Hi Group, for a project[1] I am trying to find an OS independant way to measure the amount of cpu usage and memory consumption of the program. It would be nice if I could do that in my C++ code, so I can show the results at runtime or even … |
| | Hi I have a program i was writing to solidify my knowledge of files and how to handle them. I seem to have hit a snag though. What the program does is create files based on a user inputted date and allows them to add content to the files (kind … |
| | Hi ppl, I've written a simple program with strings. this just recives the name and last name of a person, and then print it. i had a few problems with this: at first, it didnt let me define a variable as "string", it gave this error: [code=cplusplus] C2679: binary '>>': …  |
| | Hello people, Alright, my problem is something like this. I've declared a nested struct within a class template, and i want one of the member functions of the class to return an object of type struct. Somehow, i seem to be unable to do this defining the member function outside … |
| | hello freinds.I am anshul agarwal doing my summer internship in Germany. I am facing one problem in visual c++.. Actually i have done a project in borland c++ but because of memory constrain, I am forced to switch over to visual c++... My program is to read 5000 data from … |
| | Hi guys, I'm having a little problem setting a string value to another string.. I have the class: [CODE] class FILENAME { public: string GetFullPath() const; void SetFullPath(string& fname); private: string fullpath; }; [/CODE] The declaration for the SetFullPath Method is: [CODE] void FILENAME::SetFullPath(string& fname) { fullpath = fname; } … |
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