Hi: down to business: I need to know whether, when a class method in C++ is called, the implicit 'this' pointer is the first argument, or the last. i.e: whether it is pushed onto the stack first or last. In other words, I'm asking whether a class method, being called, is taken by the compiler to be: int foo::bar(foo *const this, int a...
Given the code in Main: // main.cpp wineries->insert(winery("Lopez Island Vinyard", "San Juan Islands", 7, 95)); Two things will happen: The winery ctor is invoked where I have intialized the winery private members: //winery.cpp winery::winery(const char * const name, const char * const location, const int acres, const...
I maintain an application running on Windows that allows the user to specify that certain reports are always sent to a specific printer. I am currently storing PRINTER_INFO_2::pPrinterName for each configured report into the registry. When the report is run, I use EnumPrinters() to locate the correct printer and pass the appropriate ...
Ok, I'm new at C++. I got Bjarne's book, and I'm trying to follow the calculator code. However, the compiler is spitting out an error about this section: token_value get_token() { char ch; do { // skip whitespace except '\n' if(!std::cin.get(ch)) return curr_tok = END; } while (ch!='\n' && isspace(ch)); ...
EDIT: Problem solved. This was (yet another) situation where the problem wasn't really where it looked like it was. The clue was the use of @0xfeeefefe as a pointer to an object. This is an address that is returned by a windows API function when freeing memory... indicating that the object that was being operated on had been deleted. I'...
I'm trying to overload the operator << as a friend to a template class Pair, but I keep getting a compiler warning saying friend declaration std::ostream& operator<<(ostream& out, Pair<T,U>& v) declares a non template function for this code: friend ostream& operator<<(ostream&, Pair<T,U>&); it gives a second warning as a recommenda...
What is the difference (memory wise) bewteen: for(int x=0;x<100;x++) { int y = 1+x; } and int y = 0; for(int x=0;x<100;x++) { y = 1+x; } I've always wondered if they are the same or the first is a waste of memory?... ...
I am using boost::thread_group to create(using thread_group::create_thread()) and dispatch threads. In order to limit the max thread numbers, at the end of each thread, I remove the thread from the thread_group and delete the thread itself(so that I could decide whether new threads need to be created). However it hangs somewhere be...
Hello all, C# has a nice static method String.Format(string, params string[]); that returns a new string with the formatting and values that are provided. Is there an equivalent in C++? The reason is because I'm using log4cxx and want to take advantage of the macros like LOG4CXX_DEBUG( logger, expr ); that uses short-circuit ev...
I know that most of you might have noticed now. When you try to evaluate an expression using watch on RAD Studio 2007, it does not evaluate. For example, if I had a vector, I could not do "vecData.size()", if I do "vecData.size", it just gives an address. Is there any other way to watch the size and view each element of the vector in R...
I'm C# programmer, and don't introduce with Native. I have a Native DLL, & I'v to use that in my project, but cause some of types are impracticable in Managed code. I'll to prepare a DLL in Native(C++), and I want when an event occure, then aware my Managed Code; How can I do that? ...
I have a need to calculate the minimum area rectangle (smallest possible rectangle) around the polygon. The only input i have is the number of points in polygon. soryy for the incomplete information . Yes i have the co-ordinates of the points also Thanks ...
Is it possible to stringify a character in a preprocessor macro without it including the (')s example: #define S(name, chr) const char * name = #name chr usage: S(hello, 'W'); //should expand to 'const char * hello = "helloW" Thanks a bunch!, Andrew ...
Can we write abstract keyword in C++ class? ...
Micropather requires users implement their abstract class "Graph" in order to use the library. What's a good way to do this from C++/CLI so I can use Micropather in .NET? There are only two methods to implement: virtual float LeastCostEstimate( void* stateStart, void* stateEnd ) = 0; virtual void AdjacentCost( void* state, std::vector<...
I'm working on a piece of C++ software which runs on all Windows versions between Windows XP and Windows Vista. In my code, I developed a DLL which links against a standard library (the Qt library). Once my software is deployed, it's not unusual that the user doesn't have the exact same Qt build on his system but a slightly different con...
Hi guys, I want to know if there's a website that provides amazing code star designs for my console application. For example I want a code that can output the pyramid using for loops: * *** ***** ********* Or code that can output the half-life logo using for loops. It doesn't matter where the code was created, as long as I c...
Hi all. I'm having a linking issue with a basic C++ program. No, I'm not including .cpp files! This is what's happening. main.cpp #include "header.h" #include <iostream> int main() { std::cout << "Hello!"; } header.h #ifndef _HEADER_H #define _HEADER_H class Something { public: printContents(); }; #endif something.cpp ...
Freeing developers from dealing with memory management has been touted as one of the principal advantages of managed code languages such as C#. Are there any studies/real-world examples of actual productivity gains of developing commercial applications in C# vs. C++? ...
Hi, Is it possible to access a base class function which has the same signature as that of a derived class function using a derived class object?. here's a sample of what I'm stating below.. class base1 { public: void test() {cout<<"base1"<<endl;}; }; class der1 : public base1 { public: void test() {cout<<"der1"<<endl;...