[c++] Forum Topics

Hi, I have not programmed for at least 9+ years and am looking to try to get back into it. How can i implement the encryption and decryption as used in DES. The program should ideally receive a message or open a file to encrypt it or decrypt it. it …

hi!!!!! i just want 2 ask tht how czn i select the topice 4 project.... can somebody give me some examples..... tell me let u one thing tht i am a beginner...

(The program below should calculate sine of an angle without using c math library.The angle should be in radian otherwise the program will convert it to radian.The program gives me the wrong output which probably means that it has some logic errors.I think the problem could be with the formula …

Last week I asked about this so I tried to write another example to try it out. I have a Line class which needs to have and members of type Point and member functions that return type Point. The Point class needs to have member functions that return type Line …

Hi all, In graphics mode, I need to read hexadecimal value from a file and assign it to variable for which i can add other value later. Eg : I need to read value 1007(hexadecimal) from a file and assign it to a variable. Later when i add 3 to …

Hi all Is there anybody who can solve this problem? This is not a easy problem. Problem: Assume that George(S,X) is a function that returns a Boolean value, where S is a stack, and that the time complexity of George is O( log |S| ) , where |S| is the …

I am getting compiler output that makes me think I have some sort of syntax error like a missing ';' or misaligned (). But I've checked my code thoroughly and can't find anything wrong. What else could cause this kind of error? I included the compiler output along with my …

Hello Everyone. Project outline: [QUOTE]I've to make a project which is the following: I'm a Car Distributor that distributes(sells) cars to different Car Dealers I should have a stock class with all the different types of cars I have ej(Toyota: 100, Mistubishi: 220, etc...) each type of car should have …

I'm self studying from the book, C++ Primer Plus Fifth Edition, by Stephen Prata. The following relates to Chapter 13, Page 699, Programming Exercise #4. One task is to write the derived class method definitions based upon the given prototypes. The following are the said prototypes. [CODE="cpp"]class Port { private: …

I cannot compile my programming..abnormal programming..anybody whi knows where is my mistake? [code=C++] { int count, k; { count=0; myfile<<"i,j|"; for ( int i = 1 ; i < students.size (); i++ ) for ( int k = 1;k<students.at(i).examcode.size(); k++ ) { count=0; for (int colHead = 1; colHead <students.at …

We're learning about functions in Intro to C++ and a problem is telling me my getInput() function is supposed to "get the user's weekly payrate" but at the same time it also says "remember the getInput() and displayInfo() functions are void." How can I get input if there the function …

I've been trying different things all weekend trying to figure out what is going on here. If I log in to my server via a PC and telnet, it comes through just fine. So I know it's my code here is messed up. Here's my code [CODE] while(1) { mbstowcs(CHAT," …

Can an Interface file contain multiple classes? If so how would one implement this interface file (what specifications do you need to use to specify which class you are using)? If this is not legal or is a bad programming practice then please explain why. Thank you, Arielle

Thank you for your advancing helping. I do have a problem in how to encode a bank account that has : 1. account number,user name , intial deposit and balance (updatable) 2. that a specific user can see his balance 3. a user can withdraw money 4. a user is …

hey I'm trying to run this program on netbeans on Ubuntu #include <windows.h> #include <GL/gl.h> #include <GL/glext.h> #include <GL/glu.h> #include <GL/glut.h> void myInit(void) { glClearColor(1.0,0.0,0.0,0.0); glColor3f(0.0f, 0.0f, 1.0f); glPointSize(9.0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0.0, 640.0, 0.0, 480.0); } //<<<<<<<<<<<<<<<<<<<<<<<< myDisplay >>>>>>>>>>>>>>>>> void myDisplay(void) { glClear(GL_COLOR_BUFFER_BIT); glBegin(GL_POINTS); glVertex2i(400, 350); glVertex2i(100, 130); glVertex2i(150, 130); …

how do I Write a function call WelcomeMsg which displays the message "Welcome back! I wish you have a great Spring Break". Then write a calling statement for it?

Here's a fairly simple piece of code to get a message from the user, limiting its length to 10 chars. Problems arise when the message is 10 chars or more, and the program enters an infinite loop. I think the problem is getline() leaving somethin on the stream, but I've …

I am working on a problem where I must show all perfect integers between 1 and 1000, as well as the divisors to get them. I can get the integers just fine with this code: [code]#include <iostream> using namespace std; void Perfect(int); int main() { for (int i = 1; …

I have a txt file where data is arranged in a list eg: 0001 0002 0003 0004 etc... Andy i would like to change specific columns to the same data eg: | 0a01 0a02 0a03 0a04 |

hello! I want to know about string tokenizer. i have a file of the following format:- Studentname StudentID Studentgrades each is separated by a tab. and the size of the file is unknown. I have to read each line using string tokenizer..Well, i dont know much about this, can someone …

Hello, I would like to apply object-orientated programming in C++ to sets of 3D images. I would like to do 4 classes: -dataset:an array of 3D images, contain the nb of 3Dimages as an object -3Dimage:an array of 2D images, contain the nb of 2D images as an object -2Dimage:an …

Is the only way to stores strings as a variable in C++ is by having an array of type char?

hi every body.... i need little help regarding project which we have to made in C++..... can someone guide me tht which type of topices can selected...... i am very much confused....:S

Hi all, I would like to know in what situation template is used instead of inheritance and vice visa. examples are appreciated. I just know template is static binding while inheritance is dynamic binding. so if speed is concern, template is better.

Hey folks. I am confused as to how i can make a constructor take zero - or lets say 3 arguments. If i do this in my main.cpp: [code] const Vector v1; const Vector v2(1.0, 2.0, 3.0); [/code] And this in my vector.cpp file: [code] Vector::Vector(double new_x, double new_y, double …

First of all, forgive the corny title, I couldn't resist once I thought of it. ;) I have a small assignment for a statistics class that had been giving me a little bit of trouble. How we did the assignment was left up to the students since it is a …

Hi all, In graphics mode, (using bgi).. is there any function like the printf statement when with %x gives the hexa equivalent??

[code] #include <iostream> using namespace std; class fibonacci { private: int num; public: long fibNum(int n); fibArr(); }; //============================ long fibonacci::fibNum(int n) { n=num; if (n<0) { return 0; } if (n<2) { return n; } else { return fibNum(n-1) + fibNum(n-2); } } //============================ fibonacci::fibArr() { int *Arr; Arr=new …

can any one knows how to convert a number to word like this 192 to one hundred ninety two i can't get the logic of that who can suggest of that i can't solve that.. plz help me

I'm trying to have a getData function transfer all the objects it is holding in its array to a new array so that the new array can be used in a friend function to print the objects' information. [CODE]void Set::getData(Set& tempSet) const { for (int i = 0; i < …