I need to build an array in a function and return that array. Well, two arrays actually, which means I can't return it in the return statement.
Long term, this function/method is supposed to return two populated buffers for further processing. The buffers/arrays are loaded from a file. So, the size of the array is completely unknown until after the file is read. So, you can't have a fixed size array until the function is almost ready to return.
I'm hardcoding the arrays here for testing purposes, but eventually they will be loaded in from a file. That's the whole purpose of this.
Anyway, I need to pass the arrays that are created in this function/method to the caller. But I can't figure out how to do it. The code "almost" works, except that it's overwriting my array when it returns.
VertexListPointer returns the correct data structure (actually its an array of structures). The problem is that the first time I use the other variables it over rights the array. The pointer still points to the same spot, but VertexBufferDescription is next to the VertexListPointer and so completely overwrites it.
What I "think" I want is to allocate the array in a totally different area of memory. VertexListPointer should be a pointer, not a contiguous block of memory. It should point to the contiguous block of memory elsewhere.
This is where my weak understanding of pointers comes back to bite me in the posterior end.
In the end, I just want to pass back two arrays/buffers to be used by the calling code.
So the latest challenge from jumping into c++ is as following.
Code: Write a function that builds the multiplication table of arbitrary dimensions This chapter also talks a ton about 2d arrays.
So I've built my program thus far as this.
Code: #include <iostream> using namespace std; int drawTable(int,int); int main()
[Code] .....
So basically, the idea is that I can use the arrays dimensions as a placeholder, and just multiple them to get that specific spot, so table[0][0] = 0, [0][1] = 0 and so on. However the output actually seems to be randomly generated numbers so I'd like to ask, what am I doing wrong? Am I on the right track? Or have I missed the bus stop completely.
i want to write a c++ program to build min heap which gets above values from user. remember this program should not alloduplicate values to enter. it should discard duplicate values.
i have four email adresses (for various reasons) and i could probably find a client for all three on source forge, but i thought it would be good practice to use my own. i want to use boost, sdl, and c++, but i cant find a tutorial.
I have lot of C++ API exposed in our project and I want to build an application that queries the database and shows some stuff to the user in the UI.
So, essentially, my main code is in the c++ language. What choices do I have over the UI?. I am interested in showing this UI in the form of a html page lilstening to a port.
Build a class named "salesCompany". Save it's name with a string and an array with records which will be filled with values from sales in different cities of the company.
Build the constructor which must get as a parameter the name of the company and a text file which will fill the array. There is an example of the text file format. Every line saves the sold quantity of a product, identified by a code, in a certain city.
CodeCityQuantity 1a63bCity11200 45ab8City2550 #include <iostream> #include <string.h> using namespace std; class salesCompany {
[code].....
what should I add more and how can make it available for the user to enter as an input a text file.
I want to build a dll library with visual c++ 8.0 and got an "unresolved symbol" linker error message when trying to use the library with an application. So I checked the dll library with dependency walker for the exported functions, the needed functions were missing in the library.
I then dumped the corresponding object file with dumpbin.exe, the function was declared as public, like the other exported functions. On the next step, I set the verbose switch for link.exe.
The verbose log told me, that the function was discarded on the linker run. What can lead to that behaviour of the visual c++ linker ?
I am trying to build a web application that uses p/invoke to access a method. Similiar to the one used here - [URL] However I keep getting the following error message - Unable to load DLL 'MyDll.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E) I read say to change the output directory to match that of the Mydll directory I have tried that and it still does not work.
I have a set of projects. Each one builds either a static library or an executable. What I'd like to do, is at build time I want to embed a version string representing the version of the executable as well as the version of each library. These version strings will come from an external source (in my case it's based on a "git describe" call, but that's beside the point). Embedding such strings can be highly valuable for traceability. (Versions of 3rd-party libraries are not necessary.)
I'm using qmake as my build system, but this should work more or less similarly with any build tool. What I'd ideally like to do is define this process in such a self-contained way that a an absolutely minimal amount of additional code is required in order to leverage it. Preferably, nothing more than an include(version.pri) in each project's .pro file in order to collect the versions. (Retrieving them later, such as to respond to a --version command-line flag, can be done via traditional C++ methods.)
What I've done so far is to define a singleton VersionTracker class, and then tweak the build system so that "MODULE" and "VERSION" are preprocessor symbols defined at build time. I've also tweaked the build system so that a file in each project, version.cpp, is rebuilt (and regenerated if necessary) on every build regardless of changes. This source file can capture the information in the preprocessor symbols into each static library and the executable.
Now, here's the problem. How can I get the information from those version.cpp files into the VersionTracker class? I thought I could use a global object's constructor to do it, but it turns out the symbols are stripped out when the static libraries are linked so I only get the executable's version. I also found a page on stackoverflow detailing a very clever way to call a registration function at class definition time, but again the class definition appears to be stripped out if it's defined in the version.cpp file of a static library and not referenced elsewhere.
Everything I've read basically says you either need to use linker flags to prevent symbol stripping entirely, which is probably an adoption-killer for this hack, or you need to use an explicit registration function called from the executable. I'd prefer to avoid this since it is just another thing a programmer could forget to update when a library dependency is added or removed.
My last idea, which I haven't tried yet, would be to put each version.cpp into a separate static library from the one it is describing. This version-only library could be linked without symbol stripping. I don't love this concept but it might work.
I haven't yet figured out how shared libraries can be worked into this framework at all. I'll worry about that after I get static libraries working.
I'm supposed to build a banking simulation program around the BankAcct class, which provides the following service: create new account with unique account number (maximum 5 accounts created in a single test running); deposit/withdraw; print information of all existing account. I was running a test program with only 2 services first, namely creating new account and depositing, but the program just keep on crashing and I couldn't figure out why.
#include <iostream> #include <sstream> #include <string> using namespace std;
I am getting some weird errors while building in release mode. It works fine in debug mode. Libraries and includes are linked in both debug and release version, but it's acting like it's not.
getting an invalid null pointer error message after a successful build. This program is supposed to ask for firstName, lastName, age and maJor and keep doing so until the age that is input is 0 and then the program closes. Here is what I have.
#include <iostream> #include <string> using namespace std;
I have created a shared object in Ubuntu (libMYLIB.so). I am now trying to compile a simple test program (testmylib.c) to see if the shared object is properly built. I am getting an error that the build cannot find the shared object. My build command is:
I want to use one median function "selectfunction" to choose one of the 2 other functions at random to pass my 2-dim array to the selected function. There is a problem in the median function
#include <iostream> #define random(x)(rand()%x) // for random number between numbers of 0 and 1 using namespace std; void proc1 (int iArray[][2]); void proc2 (int iArray[][2]); void selectfunction(int iArray[][2]); int A[4][2] = {{1, 2} , {3, 4} , { 5, 7} , {8, 1} };
