Beginners - C++ Forum - July 2009 (Page 16)

So, I'm working on defining a class, it's functions, and using them in a program. I want to define the class in a header file, the functions in a source file, a...

[3 replies] Last: In the header, then source files which #include your header will also ... (by Bazzy)

by Jauch

Using overloded [] problem

Hi! I have this code: class A { public: void *operator (const int &index) { return item ; } public: void **item; }; class B { ...

[1 reply] : That is because item_a is a pointer, not an object you should be able... (by Bazzy)

by QuantGuy

Eclipse Compiler

I have just started learning C++ and the book I am using wanted me to create a simple program: #include <iostream.h> using namespace std; int main() { co...

[1 reply] : You should have <iostream> (Current Standard), not <iostream.h> (Old) ... (by Bazzy)

by equilibrium2000

outputing a 2d array to file

hi, i am new to c++ and not sure how to output an array to file in a particular structure. the file needs to have elements of each row seperated by spaces or c...

[1 reply] : You should be using 2 for loops for reading the data, from that you ca... (by Warnis)

by Lilium426

where is "namespace std" defined

Hello everyone. I am wondering what is exactly in "namespace std", so I want to find out where it is. Thanks for your help.

[3 replies] Last: Oh, I understand. Thanks! (by Lilium426)

by gunsnet

loop inside the loop hlp

plz hlp me here masters! #include <iostream.h> void main() { int z,x,y; { for (x=1;x<=2;x++) { for (y=1;y<=5;y++) { z=x*y; cout<<z<<","; } cout<<...

[1 reply] : No need for embedded for-loops #include <iostream> using namesp... (by Tevsky)

by vince510

math question for my program

I am about to start a program that requires using a formula that calculates the distance of a launched projectile given the velocity and angle. The formula is:...

[4 replies] Last: I compiled the program but i don't think its working. I am not very g... (by vince510)

by theturbanator

Accessing variables in a structure

Hi, I have defined a structure that has six variables in it: let us say that the structure is named PhaseState and the variables are x, y, z, xd, yd, and zd....

[5 replies] Last: oh alright, i got it. i had read in the cplusplus tutorial that only ... (by theturbanator)

by CodeBugs

Storing pointers to dynamic memory in a <map>

I'm running into some problems storing pointers to objects I've allocated in dynamic memory with a key stored created in stack memory (relevant code only includ...

[8 replies] Last: OK I've done this in phidgetmanager.h : // Definition (?) outsid... (by CodeBugs)

by twoscoops

Back to basics

OK, back to some really basic stuff. Would someone be kind enough to explain this program, it's part of the beginners c++ tutorials !! (I said it was basic) ...

[6 replies] Last: Like it has been said, you can just think of a "reference" as just bei... (by firedraco)

by CodeBugs

Are pure virtual constructors possible ?

Hi there, I'm attempting to write a base class and some derived classes for Phidget modules and am currently wondering how I might include a virtual pure con...

[10 replies] Last: kempofighter, Thanks for your reply, I think you've answered what I... (by CodeBugs)

by fire child

I have never seen this error before

The error is "Unhandled exception at 0x00415360 in grid.exe: 0xC0000094: Integer division by zero." what I'm trying to do is find a random number on a grid....

[3 replies] Last: Ok I've found where my problem is How do I set randnum to the number ... (by fire child)

by Force

Exercise with multiple includes

Hi!I'm new here and I'm an absolute beginner and I'm reading a book here about C++ and there's a topic about multiple includes and header files.There's an exerc...

[4 replies] Last: Thanks for the reply. (by Force)

by Bv202

Fractions

This is more a math question then a programming one, but as I need to program it, I guess it's ok to post it here. I need to make an addition of 2 fractions....

[5 replies] Last: My bad ^^ (by mcleano)

by areyoupp

<< and >> operator problem

1. `std::istream& operator>>(std::istream&, frac&, char&, frac&)' must take exactly two arguments 2.33 `ch' undeclared (first use this function) 3.39 redef...

[4 replies] Last: oh yes.That's ok. and discoverable .thank u again (by areyoupp)

by steelslasher

Get filename from path

I want to split a path into the filename and the directories. I have tried to sscanf but i cant figure out how to set and forward slash as a white space s...

[2 replies] Last: thanks helios, i can now carry on with my projects thanks to you! (by steelslasher)

by prolink007

getline() and segmentation fault

My problem is that this part of my code keeps returning a segmentation fault at "currfile.getline(value, 256, '\n');". What can i do to fix this or avoid it?...

[2 replies] Last: Thanks helios, that worked. (by prolink007)

by easyz

Pointers and dinamic memory

Hello, I have to do some program, similiar to the Facebook. I wrote the syntax, but it doesn't compile...I don't know what the problem is... Will appreciate...

[8 replies] Last: This is stiil me, but from another username. the problem is not in th... (by Timtam)

by Raupi

100000000000000000000000 in cpp

Hello there; i am trying to declare a variable, 10^23 in cpp; i already tryied: #include <stdio.h> #include <math.h> int main(void) { unsigned lon...

[5 replies] Last: Thanks to everyone; these helped a lot. (by Raupi)

by SoulRyder

What is exactly the difference in << and >>

Some time ago I did half the tutorial about C++ programming, and because its a while ago I am going trough it for a second time. But I just noticed I never real...

[2 replies] Last: Ok thanks for your clear and fast explanation :D (by SoulRyder)

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Beginners - July 2009 (Page 16)