When I try to compile this: #include <map> #include <string> template <class T> class ZUniquePool { typedef std::map< int, T* > ZObjectMap; ZObjectMap m_objects; public: T * Get( int id ) { ZObjectMap::const_iterator it = m_objects.find( id ); if( it == m_objects.end() ) ...
I have this algorithm here: pc = # the point you are coloring now p0 = # start point p1 = # end point v = p1 - p0 d = Length(v) v = Normalize(v) # or Scale(v, 1/d) v0 = pc - p0 t = Dot(v0, v) t = Clamp(t/d, 0, 1) color = (start_color * t) + (end_color * (1 - t)) to generate point to point linear gradients. It works very well for me...
Possible Duplicate: Difference between void main and int main? Alright, so I'm using bloodshed complier, first thing I should note is I'm using a 2001 edition C++ for the absolute beginner, was there any changes to C++ since 2001 that would effect the validity of this book? I ask because I know php has php5 and now php6 but I...
I was given the following code: class FibHeapNode { //... // These all have trivial implementation virtual void operator =(FibHeapNode& RHS); virtual int operator ==(FibHeapNode& RHS); virtual int operator <(FibHeapNode& RHS); }; class Event : public FibHeapNode { // These have nontrivial implementatio...
I have a vsprops file that defines the optimizations all of our projects should be built with for Visual Studio 2008. If I set the properties for the project to "inherit from parent of project defaults" it works, and fills them in the vcproj file. However, this doesn't protect me from a developer checking in a project file that changes t...
I have code which works on windows, that calls LocalAlloc as follows: LocalAlloc(LMEM_ZEROINIT, size) I need the equivalent malloc or calloc call to get this to work on Unix systems, through Mono. Simple answer? ...
I have a WCHAR[]: WCHAR foo[200]; I want to copy values into it: if (condition) { foo = L"bar"; } else { foo = L"odp"; } What is the best way to do this? ...
I haven't done much c programming but when I do when I need a false I put 0 when I want true I put 1, (ex. while(1)), in other cases I use things like "while(ptr)" or "if(x)". Should I try using C99 booleans, should I recommend them to others if I'm helping people new to programming learn c basics(thinking of cs 1?? students)? I'm p...
In my application I can programmatically open explorer and select a file using the following code: void BrowseToFile(LPCTSTR filename) { CString strArgs; strArgs = _T("/select,\""); strArgs += filename; strArgs += _T("\""); ShellExecute(0, _T("open"), _T("explorer.exe"), strArgs, 0, SW_NORMAL); } My problem is t...
I have a method: odp(foo& bar); I'm trying to call it: foo baz; odp(&baz); I get a compiler error: error C2664: "odp" cannot convert parameter 1 from 'foo *' to 'foo &' What am I doing wrong? Aren't I passing in a reference to baz? UPDATE: Perhaps I have a misconception about the relationship between pointers and references. I ...
I want to dynamically create and populate an excel spreadsheet with C++ builder 2009, but I'm not entirely sure how to go about it. Searching the web, I've narrowed it down to using OLE Automation. Moreover, I'm looking for a document or programming tutorial that can get me started. Is there a simple programming tutorial that also thorou...
My current project requires me to fill an array based upon some other values. I know there's the shortcut: int arr[4][4] = { {0,0,0,0} , {0,0,0,0} , {0,0,0,0} , {0,0,0,0} }; But in this case, I need to fill the array after its declaration. I currently have my code formatted like this: int arr[4][4]; if(someothervariable == 1){ ar...
See code. :P I am able to receive new connections before async_accept() has been called. My delegate function is also never called so I can't manage any connections I receive, rendering the new connections useless. ;) So here's my question. Is there a way to prevent the Boost ASIO acceptor from getting new connections on its own and onl...
Here is the code I have at the moment: char ch; int sum = 0; double values[10]; int i = 0; cin >> ch; while (!isalpha(ch)) { values[i] = ch; sum += values[i]; i++; cin >> ch; } What is happening is that if I enter the value 1, that gets assigned to ch as a char. Now ch is assigning i...
I have a wstringstream: wstringstream sstream; AlterSstream(sstream); wstringstream bar_stream; bar_stream << sstream; bar_stream << "foo"; MessageBoxW( NULL, bar_stream.str().c_str(), L"subject", MB_OK ); This outputs a long string that looks nothing like what I put in it in AlterSstream(): 00000000002CEC58foo AlterSstr...
Hello! I have some code which shows a simple dialog box and handles user action (written using plain WinAPI). // Display dialog and handle user action LRESULT choice = DialogBoxParam(NULL, MAKEINTRESOURCE(AP_IDD_DIALOG), NULL, (DLGPROC)DialogCallback, NULL); Is there any way to hardcode the resource file dialog.rc, which is used to ...
Assuming a very simple program that: ask a name. store the name in a variable. display the variable content on the screen. It's so simple that is the first thing that one learns. But my problem is that I don't know how to do the same thing if I enter the name using japanese characters. So, if you know how to do this in C++, please ...
Having recently done some development for iPhone, I've come to notice an interesting design pattern used a lot in the iPhone SDK, regarding object mutability. It seems the typical approach there is to define an immutable class NSFoo, and then derive from it a mutable descendant NSMutableFoo. Generally, the NSFoo class defines data membe...
I want to start a new C++ (Qt) Open Source project and I'm wondering if there is an existing template somewhere for files usually found in an Open Source project but that are not purely source code (README, LICENSE, CHANGELOG, etc.) I could probably find a popular Open Source project for inspiration but if there is some existing generi...
I have seen this in a few places, and to confirm I wasn't crazy, I looked for other examples. Apparently this can come in other flavors as well, eg operator+ <>. However, nothing I have seen anywhere mentions what it is, so I thought I'd ask. It's not the easiest thing to google operator<< <>( :-) ...