General C++ Programming - C++ Forum - December 2009 (Page 10)

Im having trouble with a program to write binary trees and binary search trees.I can print the binary trees but not the binary search. I believe it has somethi...

[3 replies] Last: please someone help me,i am a horrible programmer and need help. (by kakashi316)

by AlwaysLearning

Trying to understand dirty testing.

My understanding of it is a test that runs data contrary to expected input data. For example, lets say we have written a string length function which takes a c...

[7 replies] Last: If the size of the buffer is incorrect; you'll get a buffer overrun, s... (by chrisname)

by NickPaul

Creating Thread Within Object?

Having some trouble creating a thread within an object: NetworkManager::NetworkManager(unsigned short serverPort) { run = 1; run = create...

[3 replies] Last: Good ans ireshagun, just wondering if there is another way to do it? I... (by NickPaul)

by vholcomb78

Trouble with function call char *filename

Hi, I am trying to use this function void Graph::load (char *fileName) Where what I am trying to pass in is a command line argument from argv...

[2 replies] Last: Ah I'm stupid. It was an include problem with my Eclipse Makefile! (by vholcomb78)

by kaitoyzc

double deletion problem

I have a class call Roster which consists name of the course and instructor and a pointer points to a array of pointers to Student objects (Student** slist) as ...

[12 replies] Last: Thank you very much~! I get the picture now. (by kaitoyzc)

by prasadi

Map clear()

Hi all, This is the description for map clear() function in wikipedia.. vector::clear - Erases all of the elements. (For most STL implementations this ...

[5 replies] Last: Thanks a lot Disch. (by prasadi)

by mushroom000

Printing long double precision

The maximum value for the Microsoft Visual C++ 6.0 compiler is 1.797693e308. I would like to print this. Could someone tell me why im getting an output of ...

[10 replies] Last: Ah, I see. Thanks. (by mushroom000)

by kakashi316

linker issues

Im getting linker issues with a program ive been writing.I am using DEV C++,i tried running on microsoft visual C++ 2008 and it was giving me linker issues ther...

[11 replies] Last: You should add the header guards marknyc suggests as well in case yo... (by Zhuge)

by yeet

how to update an answer?

for example: //key in: i=8; for(n=i, n>=2,n--) ZT8=0.099 //let said Ztn=ZT8 ZT7=(ZT8+5.5+j8.3) //let said Ztn now become ZT7 ZT6=(ZT7+6.8+j8.9) /...

[2 replies] Last: i had found the problem!! i had accidently defined the Ztm twice.. ... (by yeet)

by mushroom000

Conversion Specifiers for Output

Heres what I dont understand. If I have value = 157.8926 and I want to print that value. Why does %g give 157.893 and %f give 157.892600. I thought they would g...

[2 replies] Last: I realize that. The input is just for an example. Whether I use %lf ... (by mushroom000)

by rocky28

How to calculate perimeter, area and centroid of a polygon

Hello, Does anyone know how to calculate the perimeter, area and the centroid of polygon, given its number of corners and the position of each of them. An exam...

[1 reply] : We aren't just going to give you the code for free. You have to work o... (by Zhuge)

by AlexRamallo

Inherited constructors

I'm learning inheritance in C++, and I ran into a little problem. Lets say I have a base class: class BaseDialog{ const char *message; const char *titl...

[3 replies] Last: Thanks for the help, I solved the problem (by AlexRamallo)

by sporx

reverse a string

in a situation like the one below, how would you go about reversing the string? #include<iostream> #include <string> using namespace std; int main ...

[3 replies] Last: Unnecessary variables... #include <iostream> #include <string>... (by mcleano)

by jeffrich4

Virtual Functions and Classes

I am to create a project that evaluates math expressions and their derivatives. I have a Formula class with only virtual functions: virtual void print() vir...

[1 reply] : What have you written so far, and what problems are you having with it... (by Zhuge)

by tappedout

Pointers, Structs, Vectors Problems

I am trying to write a program incorporating structs, pointers and vectors and am having a hard time getting code to work. I am creating of vector of structs. ...

[2 replies] Last: That worked!! Awesome! Thank you! I used a pointer so that I can ... (by tappedout)

by ARWA

finding the angle >.<

hi, i want 2 calculate the angle pettween 3 potential sides by this formula fabs( (slope2-slope1)/(1 + slope11*slope2)) ; so , what i want is the angle...

[6 replies] Last: It is. (by Zhuge)

by vaflyboy03

Program not reading Char String

ok i have to write a function that receives a pointer to a character string and a character. the function should return the number of times the charcter occurre...

[1 reply] : 1. I suggest you not use system() although that's not the problem here... (by closed account S6k9GNh0)

by sporx

code::blocks will not open .txt file

Hi, ive been having an issue with code::blocks where the lines below will not open the .txt file when i run the program within code::blocks. However if i go to ...

[2 replies] Last: i changed it from "." to ...\c++\board\bin\debug, where both the .exe ... (by sporx)

by nananya88

A question of OpenGL

I have created a merry go round model,how can i let it spin? Did i need to use For loop? It is better if someone can show me example script. 1 more questio...

[3 replies] Last: You need to set up the blending: glEnable(GL_BLEND); glBlendFunc(GL... (by Bazzy)

by zero1854

Question to generates random math problems.

I was asked to write a c++ program to generates random math problems. Here's my code so far. It works, but it's not the result that i want. Right now it only g...

[4 replies] Last: That's a pretty good idea, actually. (by chrisname)

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General C++ Programming - December 2009 (Page 10)