a pointer to a function, which can be stored in a variable allows a run-time choice of which function to run
0
votes
0answers
13 views
Changing function pointers after compilation
I am using Ogre3 to try to build a Spawner that automatically creates copies of an Enemy and drop them into the world. In addition to this, I want to save a behavior function so that when the entity ...
-3
votes
1answer
57 views
c++: Address will always evaluate to true error [closed]
I wrote my own atexit method, the problem is, everything passed in is 1. When I attempted to print the address before providing it to my atexit, the compiler generated the following warning:
void ...
0
votes
0answers
12 views
what is a preferred mode to communicate with the driver, ioctl vs escape callback
I'm on a windows environment here. I wanted to understand the differences (be it performance, pros/cons) between using ioctl call vs escape calls.
ioctl call
Escape call looks something like this ...
0
votes
2answers
41 views
Deleting allocated array within function vs in main
If I declare a allocated pointer inside main
char *ch2=new char[10*17];
char *ch2p=ch2;
while(infile.get(*ch2))
{
cout<<*ch2;
ch2++;
}
.................................
char ...
3
votes
1answer
34 views
Getting documentation from a function handle
Generically, if I have a function handle (but not the function name), is there a way to see the "help" comment block associated with that function?
2
votes
4answers
81 views
How to pass a pointer to a struct into a function using C Language?
i'm new to developing with c. sure enough there'd come a day i need your help. And I guess this time is now :)
What I am trying to do:
I am experimenting with MySQL Api in C. For that i wanted to use ...
2
votes
2answers
101 views
ScopedExit implementation: pass arguments to the function object
I'm trying to implement simple ScopedExit class. Here's the code:
#include <iostream>
#include <functional>
template<class R, class... Args>
class ScopedExit
{
public:
...
13
votes
3answers
308 views
Do function pointers need an ampersand
In C/C++, if I have a the following functions:
void foo();
void bar(void (*funcPtr)());
Is there a difference between these two calls:
bar(foo);
bar(&foo);
?
2
votes
6answers
132 views
C++ member function pointer with different arguments - or is this bad anyway?
Even though I fear that you will tell me that this topic was covered several time, I dare to ask it, since I was not able to generate a solution. Probably I was just looking for the wrong thing...
...
0
votes
1answer
17 views
Allocated arrays in functions
Lets say you have this in main
int* test;
test = createArray(test);
and this is function
int * creatArray(int* temp)
{
temp = new int [35];
return temp
}
Why do you need to return the ...
1
vote
3answers
87 views
Functional programming in C/C++?
I have been reading this article: http://en.wikipedia.org/wiki/Function_pointer and am sort of confused. Since C/C++ support function pointers, doesn't that mean they support functional programming in ...
1
vote
1answer
26 views
Calling back into a native application from Java, via JNI
So I built this C library. It calls Java methods via the JNI, everything works fine. But how can I call back from Java into my C application?
I imagine the following: I do have a function, I take its ...
1
vote
2answers
61 views
How do I use function pointers?
I have a problem with a function on a binary tree.The Tree houses client structs which among other thing, have an id number and a date field. I need to make 3 functions, 2 find_client functions , one ...
0
votes
3answers
90 views
Does “this” also adapt to function pointers?
Java has a construct that allows a method to call itself via a "this()" reference. The name of this convention escapes me at the moment.
EDIT: Known as Constructor Delegation as pointed out below. ...
0
votes
1answer
33 views
Similar Objective-C KVO in c++
I have this architetture:
I have a thread that continuously monitors the status of a shared variable.
I would like to develop a system similar to Objective-C KVO in c++ . In practice, I would like to ...
