Currently I'm working on an assignment and using C++ for the first time. I'm trying to append certain "message types" to the beginning of strings so when sent to the server/client it will deal with the strings depending on the message type. I was wondering if I would be able to put any two-digit integer into an element of the message buf...
Sorry scratch my last post, it's way to late =S But basically I'm having problems sending out the buffer I created. Just need to know where I'm going wrong =( or if theres a better way. ------ Client Sending Username ------- int bufferSize = 32; char messageBuffer[bufferSize]; char* message; if (userName.size() > 8) { cout << "I...
I'm writing a program using C++ and the MySQL C API (version 5.1.31 ubuntu2). However, if the query is UPDATE then I get a Segmentation Fault error when executing the line "RowsReturned = mysql_num_rows( Result );". //this code snippet contains only the relevant code MYSQL_RES *Result; long RowsReturned; MYSQL_RES *MYSQLDB::RunQuery( c...
What's the best way to write int NumDigits(int n); in C++ which would return the number of digits in the decimal representation of the input. For example 11->2, 999->3, -1->2 etc etc. ...
I want to blur my image using the native gaussian blur formula. I read this, but I am not sure how to implement this. How do I use the formula to decide weights? [I mentioned MATLAB because I do not want to use any built in fuctions that it has] ...
Hi can someone tell why in Linux and windows the same problem occurs : #include <iostream> using namespace std; class A { private: int _dmember; public: void func() { cout<<"Inside A!! "<<endl; cout<<_dmember; // crash when reach here. } }; int main () { A* a= NULL; a->func(); // prints "Inside A!!!" ...
I cut&pasted the below code from a previous question into a file called "avishay.cpp" and then ran gcc avishay.cpp only to get the following error messages from the linker. What went wrong, what should I have done? carl@carl-ubuntu:~/Projects/StackOverflow$ gcc -static avishay.cpp /tmp/cccRNW34.o: In function `__static_initializati...
How detect programmatically count of bytes allocated by process on Heap ? This test should work from process itself. ...
Here is my code: double round( char* strNumber, int decPlace); int main() { int decimal; char initialNumber[256]; cout << "Enter decimal and number " << endl; cin >> decimal; cin >> initialNumber; cout << setprecision (15) << round ( initialNumber,decimal ) << endl; return 0; } double round( char* str...
Hello, My application (C++ WinAPI) creates an icon in the system tray. I have set a tooltip text for this icon, so that when a user places a mouse cursor over the icon, this text shows. But I want to programmatically show different balloon notications when certan events occur and at the same time keep that behavior of showing the const...
I want to print the numbers from 1 to100 in the format 1-------------9 10------------19 20-------------29 30--------------39 40-----------49 50-----------59 60-----------------69 70---------------79 80---------------89 90-----------------99 ...
I think I messed up somehow in my design because I want to keep a vector of various object types. These types all share a common base class. Example: Class Buick: AmericanCar { } Class Ford: AmericanCar { } then I did: vector<AmericanCar*> cars_i_own; Now, I have my vector of pointers but I don't have the derived class which is wh...
I'm writing a set of unit tests that write calculated values out to files. Each test produces a square matrix that holds anywhere from 50,000 to 500,000 doubles, and I have a total of 128 combinations of test cases. Is there any significant overhead involved in writing cout statements and then piping that output to files, or would I be...
What's the difference between a derived object and a base object in c++, especially, when there is a virtual function in the class. Does the derived object maintain additional tables to hold the pointers to functions? ...
I'm developing an application that will store a sizeable number of records. These records will be something like (URL, date, title, source, {optional data...}) As this is a client-side app, I don't want to use a database server, I just want the info stored into files. I want the files to be readable from various languages (at least pyt...
I'm writing a program and I seem to be creating alot of objects where one object will be the singular form and then the collection is the plural form. eg SalesGroup SalesGroups Is this confusing for other programmers to read my code? ...
I have a header file with about 400 function declarations and its corresponding source file with the definitions. In order to replace the implementation with a mock at runtime, I want to replace the implementation with calls to an object that will contain the implementation instead (pointer to implementation - pImpl). This means I will...
While trying to evaulate polynomials using Horner's Rule I have a sample code segment like so: int Horner( int a[], int n, int x ) { int result = a[n]; for(int i=n-1; i >= 0 ; --i) result = result * x + a[i]; return result; } I understand that a is an array of coefficients and that x is the value that I would like...
Hi Guys, I have a high memory requirement in my code and this statement is repeated a lot of times: Node** x; x = new Node*[11]; It fails at this allocation. I figured out this line by throwing output to the console! I am building my code on Visual Studio. It works fine in Debug mode (both in VS2005 and VS2008) However it throws the ...
Guys, I'm developing a multiplayer game application with C++ and currently in the process of choosing an appropriate multithreading architecture for it. The core of the application is the endless loop which essentially updates each frame all entities of the game World. Currently this World loop is singlethreaded. It's working just fine...