Sorry, this was a typo - should be:
double color[3] = {1,2,3};

// ... assign ptr .... meant do something like ptr = GetAValidPointer()

The part I was concerned with is the following. I was...

Why people write such cryptic code I will never understand...

Can someone explain what is going on in the following:


double color = {1,2,3};

double *ptr;
// ... assign ptr ....

Very cool - thanks!

Is there a way to see what a macro gets expanded to?

I tried to put it in quotes and use printf, but of course printf just printed exactly the string.

The result of:

#define...

I ended up having to create a LawyerClass object and then copying in the data from the PersonClass. Thanks for the discussion/help!

Consider two classes, PersonClass and LawyerClass.

If LawyerClass derives from PersonClass, you can create a PersonClass* as a LawyerClass, like

PersonClass* Person = new LawyerClass;


then...

Say you have a class that has members

private:
double a,b,c,d,e,f,g,h,i;


You can make an accessor like:

double operator[](int index)
{

Jas, but won't it still crash evaluating the second part of the conditional?

Dave

If I have the following setup:



Point* MyPoint = Object->GetMyPoint();

if(MyPoint->GetValue() != 2)
do something;
else
do something else;

From that algorithm you gave I don't understand how you are supposed to get more than one factor?

Maybe this will be a good starting point for you - it just gets the smallest factor (besides 1)...

Is this what you are looking for?


#include <iostream>
#include <string>

int main()
{
const char NONWORD[] = "\n";

Here you have declared the variables, but then output just constant expressions...

I'd suggest googling for "basic c++" and trying some of the simple examples you find until you get familiar with...

I don't understand why you would want to remove stl features? They make things MUCH easier...

You need to give us more of a feeling that you have really tried. Did your code produce errors? Or incorrect results? Why don't you try some simple cases like the number '4'. You should expect to see...

First of all, you should #include <iostream> instead of #include <iostream.h>. This is the "new" c++ way to do it.

Second, you have to #include <cstring> to use strcpy.

Third, you have not...

I don't understand the problem...

int NumberOfPositiveRoots(root1, root2)
{
int counter = 0;
if (root1 >= 0)
{
counter++;
}
if (root2 >= 0)

What you have there is simply a hard coded triangle. You need to write the code to setup the triangle's height and width. Give it a shot and post your problem once you try it.

Please explain exactly what you need. What operating system are you using?

I had to instantiate the constructor by adding this to the instances.inc file:

template Graph<int,int,int>::Graph(int, int, void (*)(char *));


Does anyone understand why / know if the...

With this code:
http://www.rpi.edu/~doriad/Daniweb/maxflow/
If I run

g++ Example.cpp graph.cpp


with g++ 3.3, everything works fine. However if I run the same command with g++ 4.4, I get...

Interesting - can anyone else confirm?
I am using:
gcc version 4.4.1 20090725 (Red Hat 4.4.1-2) (GCC)

Hm I tried that - didn't seem to work. Here is a super simplified version that produces the same error:

http://www.rpi.edu/~doriad/Daniweb/octree/

I still think the problem is simply that they...

I'm still getting the same error. Can someone try these files:
http://www.rpi.edu/~doriad/Daniweb/maxflow/

with

g++ Example.cpp graph.cpp

I dont think so ...
The constructor is actually:

Graph(int node_num_max, int edge_num_max, void (*err_function)(char *) = NULL);


which is an optional parameter, no? Hence it should be fine...

I am doing that:

[doriad@davedesktop test]$ g++ Example.cpp graph.cpp
/tmp/ccHbyqCi.o: In function `main':
Example.cpp:(.text+0x38): undefined reference to `Graph<int, int, int>::Graph(int, int,...

Any ideas?

Does any one have any clues for me?

Dave

I am looking at some open source code and I am a bit confused. There is an Allocator class:

class Allocator{


Then in another class, they have:

class Octree{
public:
static...

Here is a simplified version that produces the error:

graph.h

#include <string.h>


template <typename captype, typename tcaptype, typename flowtype> class Graph

{

I am trying to compile some code (Example.cpp from here: http://www.rpi.edu/~doriad/Daniweb/maxflow/). I am getting


Example.cpp:(.text+0x38): undefined reference to `Graph<int, int,...

Please show us the code that you've come up with so far and we can help guide you.

The thing is, I didn't change anything except the debugger and all is well, so I don't think the this pointer could be invalid and it work now?

I have to use the this pointer because of this:...

Here is the next line:

std::set<unsigned int>::iterator it;
it = this->SubmeshVertexSet.find(MeshOriginIndex);


SubmeshVertexSet is a member variable:

private:
std::set<unsigned int>...

I guess it was a gdb bug? I compiled the latest svn and it gets past that line now with no problems.

Unfortunately this is embedded way way way in a huge project. I was trying to see if anyone could offer an "of course I can't be sure, but you could try XYZ".

Dave

Please use code tags. Also, what is the current (incorrect) output? Also, you don't seem to show where seller, cost etc are defined and given values?

When debugging my code, I put a break point at this line:

std::set<unsigned int>::iterator it;


When I step over that line, I get "Debugger reported the following error: cannot access memory...

If that line is remove then there is no warning.

I guess my complaint was just that I thought the warning should say "the function returns before reaching this point" rather than "we have reached...

I have a function like this:


bool MyFunction(dist)
{
if(dist < 1.2)
{
std::cout << "Passed test!" << std::endl;
return true;
}

I don't see any code there that is adding numbers? Just input and output... Also, please use code tags.